{
  "ml": {
    "v": "4",
    "fs": [
      {
        "id": 0,
        "prob": 0.9999779462814331,
        "class": 2
      }
    ],
    "prob": 0.99997795,
    "class": 2,
    "models": [
      {
        "m": "az",
        "prob": 0.99919266,
        "class": 2
      },
      {
        "m": "az/scripts",
        "prob": 0.99997413,
        "class": 2
      },
      {
        "m": "az/php",
        "prob": 0.99997795,
        "class": 2
      }
    ],
    "version": "v16.16",
    "thresholds": [
      0.9961138,
      0.99909174
    ],
    "analyzed_at": "2026-05-09T22:43:18Z"
  },
  "path": "f1.php",
  "raw": {
    "v": "4",
    "fs": [
      {
        "f": "KO₂(As₃C₂)H(Po)Md₃(Pt)Th",
        "k": {
          "source.imports[0]": "base64_decode",
          "source.imports[1]": "eval",
          "source.imports[2]": "gzinflate",
          "source.strings[0]": "d2RyMTU5c3E0YXllejd4Y2duZl90djhubHVrNmpoYmlvMzJtcA==",
          "source.strings[1]": "hY7NCoJAFIVf5SQu5tIUzVpc9hxSeq0huwPzA4X47ikxEm7anu/82V7t+iRttE4aftkQgyq8iyyt67ggGjPFqqoyRG/lpsvL0yWJhBHlg9+oEdJ1ZqsBJw1DFWyvZmVgyYTq2iwxzzF5QXv3yvlOLS2EPXJxhQk8BP7vxHH5d/7+274wGpv5gyH9uzJNHw==",
          "source.strings[2]": "wdr159sq4ayez7xcgnf_tv8nluk6jhbio32mp",
          "source.strings[3]": "xes26:tr5bzf{8ydhog`uw9omvl7kicjp43nq",
          "source.has_imports": true
        },
        "x": 285,
        "id": 0,
        "is": [
          "base64_decode",
          "eval",
          "gzinflate",
          "base64_decode"
        ],
        "ms": {
          "file": {
            "size": 15970.0
          },
          "text": {
            "digit_ratio": 0.17,
            "space_count": 432.0,
            "total_lines": 8.0,
            "char_entropy": 6.07,
            "unique_chars": 85.0,
            "import_density": 50.0,
            "lines_over_200": 3.0,
            "lines_over_500": 1.0,
            "string_density": 0.75,
            "avg_line_length": 1995.25,
            "lines_over_1000": 1.0,
            "max_line_length": 14981.0,
            "last_line_length": 14981.0,
            "long_token_count": 1.0,
            "most_common_char": "k",
            "whitespace_ratio": 0.03,
            "most_common_ratio": 0.02,
            "identifier_density": 5.13,
            "line_length_stddev": 4908.74,
            "encoded_string_ratio": 0.67,
            "normalized_import_count": 1.41,
            "normalized_string_count": 2.12,
            "repeated_char_sequences": 1.0,
            "suspicious_string_ratio": 0.33,
            "max_inline_whitespace_run": 1.0,
            "normalized_unique_identifiers": 2.67
          },
          "imports": {
            "total": 4.0,
            "unique_modules": 3.0,
            "third_party_count": 4.0,
            "third_party_ratio": 1.0
          },
          "strings": {
            "total": 6.0,
            "avg_length": 93.67,
            "max_length": 192.0,
            "avg_entropy": 5.28,
            "total_bytes": 562.0,
            "entropy_stddev": 0.3,
            "base64_candidates": 4.0,
            "high_entropy_count": 4.0,
            "shell_command_strings": 2.0
          },
          "comments": {},
          "functions": {},
          "identifiers": {
            "total": 41.0,
            "avg_length": 10.25,
            "max_length": 13.0,
            "min_length": 4.0,
            "avg_entropy": 2.11,
            "reuse_ratio": 0.2,
            "unique_count": 8.0,
            "length_stddev": 2.68,
            "has_digit_ratio": 0.75,
            "all_lowercase_ratio": 0.25,
            "numeric_suffix_count": 3.0
          }
        },
        "ss": [
          [
            34,
            "d2RyMTU5c3E0YXllejd4Y2duZl90djhubHVrNmpoYmlvMzJtcA=="
          ],
          [
            35,
            "d2RyMTU5c3E0YXllejd4Y2duZl90djhubHVrNmpoYmlvMzJtcA=="
          ],
          [
            120,
            "hY7NCoJAFIVf5SQu5tIUzVpc9hxSeq0huwPzA4X47ikxEm7anu/82V7t+iRttE4aftkQgyq8iyyt67ggGjPFqqoyRG/lpsvL0yWJhBHlg9+oEdJ1ZqsBJw1DFWyvZmVg"
          ],
          [
            121,
            "hY7NCoJAFIVf5SQu5tIUzVpc9hxSeq0huwPzA4X47ikxEm7anu/82V7t+iRttE4aftkQgyq8iyyt67ggGjPFqqoyRG/lpsvL0yWJhBHlg9+oEdJ1ZqsBJw1DFWyvZmVg"
          ],
          [
            522,
            "xes26:tr5bzf{8ydhog`uw9omvl7kicjp43nq"
          ],
          [
            523,
            "xes26:tr5bzf{8ydhog`uw9omvl7kicjp43nq"
          ],
          [
            6,
            "base64",
            "wdr159sq4ayez7xcgnf_tv8nluk6jhbio32mp"
          ]
        ],
        "sz": 15970,
        "ts": [
          {
            "c": 0.949999988079071,
            "d": "PHP opening tag present",
            "e": [
              "\u003c?php"
            ],
            "i": "metadata/lang/scripted::php-open-tag",
            "l": 1
          },
          {
            "a": "T1505.003",
            "c": 0.8999999761581421,
            "d": "PHP source imports base64_decode",
            "e": [
              "[base64_decode, eval, gzinflate]"
            ],
            "i": "objectives/command-and-control/backdoor/webshell/stager::source-import-base64-decode",
            "l": 1
          },
          {
            "a": "T1027",
            "c": 0.8999999761581421,
            "d": "Last line is over 1000 chars",
            "e": [
              "text.last_line_length = 14981.00"
            ],
            "i": "objectives/anti-static/obfuscation/code-metrics/structure::last-line-over-1000",
            "l": 1,
            "m": "B0032"
          },
          {
            "a": "T1505.003",
            "c": 0.949999988079071,
            "d": "Regex component marker",
            "e": [
              "eval(gzinflate("
            ],
            "i": "objectives/command-and-control/backdoor/webshell/decoder::eval-decoder-chain--rx-2",
            "l": 1,
            "m": "B0030"
          },
          {
            "c": 0.8999999761581421,
            "d": "Very long line",
            "e": [
              "text.max_line_length = 14981.00"
            ],
            "i": "metadata/file/text/metrics::single-long-line",
            "l": 1
          },
          {
            "a": "T1027",
            "c": 0.8500000238418579,
            "d": "High entropy strings (base64/gzinflate encoded)",
            "e": [
              "strings.avg_entropy = 5.28"
            ],
            "i": "objectives/anti-static/obfuscation/code-metrics/identifiers::php-encoded-strings",
            "l": 4,
            "m": "B0032"
          },
          {
            "a": "T1027",
            "c": 0.8999999761581421,
            "d": "Exactly one line exceeds 1000 chars",
            "e": [
              "text.lines_over_1000 = 1.00"
            ],
            "i": "objectives/anti-static/obfuscation/code-metrics/structure::single-long-line-outlier",
            "l": 1,
            "m": "B0032"
          },
          {
            "c": 0.800000011920929,
            "d": "Very short file (under 12 lines)",
            "e": [
              "text.total_lines = 8.00"
            ],
            "i": "metadata/file/text/metrics::file-under-12-lines",
            "l": 1
          },
          {
            "c": 0.800000011920929,
            "d": "PHP variable function invocation pattern",
            "e": [
              "O0O0O0O0O0O0"
            ],
            "i": "objectives/anti-static/obfuscation/imports::dynamic-function-execution",
            "l": 3
          },
          {
            "a": "T1505.003",
            "c": 0.8999999761581421,
            "d": "PHP file 12-22KB (single-file webshell size band)",
            "e": [
              "f1.php"
            ],
            "i": "well-known/malware/webshell/zaco::single-file-webshell-metrics",
            "l": 1,
            "m": "B0030"
          },
          {
            "a": "T1059.006",
            "c": 0.75,
            "d": "PHP eval() token present",
            "e": [
              "eval"
            ],
            "i": "micro-behaviors/process/interpreter/eval::eval-symbol",
            "l": 4,
            "m": "E1059"
          },
          {
            "a": "T1027",
            "c": 0.800000011920929,
            "d": "High entropy strings (encoded/encrypted data)",
            "e": [
              "strings.avg_entropy = 5.28"
            ],
            "i": "objectives/anti-static/obfuscation/code-metrics/strings::high-entropy-strings-dup",
            "l": 3,
            "m": "B0032"
          },
          {
            "a": "T1027",
            "c": 0.800000011920929,
            "d": "High overall text entropy (encoded",
            "e": [
              "text.char_entropy = 6.07"
            ],
            "i": "objectives/anti-static/obfuscation/code-metrics/structure::high-text-entropy",
            "l": 2,
            "m": "B0032"
          },
          {
            "a": "T1027",
            "c": 0.699999988079071,
            "d": "Very low whitespace ratio (minified/compressed)",
            "e": [
              "text.whitespace_ratio = 0.03"
            ],
            "i": "objectives/anti-static/obfuscation/code-metrics/structure::low-whitespace",
            "l": 2,
            "m": "B0032"
          },
          {
            "a": "T1027",
            "c": 0.8999999761581421,
            "d": "PHP source contains very long line",
            "e": [
              "text.max_line_length = 14981.00"
            ],
            "i": "objectives/anti-static/obfuscation/code-metrics/identifiers::php-single-long-line",
            "l": 4,
            "m": "B0032"
          },
          {
            "a": "T1027",
            "c": 0.949999988079071,
            "d": "PHP webshell pattern detected",
            "e": [
              "strings.avg_entropy = 5.28",
              "text.max_line_length = 14981.00"
            ],
            "i": "objectives/anti-static/obfuscation/code-metrics/identifiers::php-webshell-pattern",
            "l": 4,
            "m": "B0032"
          },
          {
            "c": 0.8999999761581421,
            "d": "Encoded payload detected: base64",
            "e": [
              "wdr159sq4ayez7xcgnf_tv8nluk6jhbio32mp \u003cbase64\u003e"
            ],
            "i": "metadata/encoded-payload/base64",
            "l": 3
          },
          {
            "c": 0.8999999761581421,
            "d": "Chinese Hacktool Set - file templatr.php",
            "e": [
              "eval(gzinflate(base64_decode('"
            ],
            "i": "third_party/SigBase/Templatr",
            "l": 5
          },
          {
            "c": 0.8999999761581421,
            "d": "PHP webshell which directly eval()s obfuscated string",
            "e": [
              "\u003c?php",
              "\u003c?",
              "eval(gzinflate(base64_decode("
            ],
            "i": "third_party/SigBase/WEBSHELL/PHP/Gzinflated",
            "l": 5
          },
          {
            "c": 0.8999999761581421,
            "d": "PHP webshell using $a($code) for kind of eval with encoded blob to decode, e.g. b374k",
            "e": [
              "$OO000OO000OO(base64_decode",
              "$O0O0O0O0O0O0(\"",
              "\u003c?",
              "\u003c?php",
              "eval(",
              "ase6"
            ],
            "i": "third_party/SigBase/WEBSHELL/PHP/Dynamic/Big",
            "l": 5
          },
          {
            "c": 0.8999999761581421,
            "d": "PHP webshell using some kind of eval with encoded blob to decode, which is checked with YARAs math.entropy module",
            "e": [
              "\u003c?",
              "eval($",
              "\u003c?php",
              "eval(g"
            ],
            "i": "third_party/SigBase/WEBSHELL/PHP/Encoded/Big",
            "l": 5
          }
        ],
        "sha": "dd64b7b64bcc6e7b77f846bf1fab4db11652f30dd9ab0428e513d52df0739886",
        "path": "f1.php",
        "type": "php"
      }
    ],
    "tv": "87c42"
  }
}