Malicious PDF / .PHP — malware analysis report

Static analysis result for SHA-256 e46b5bcac772ee76…

MALICIOUS

PDF / .PHP

15.0 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: bbf643192aa9f3599986cd8f9fa36a79 SHA-1: f41c4d0d4da930b2f3099addad5602b90706f132 SHA-256: e46b5bcac772ee76033122d28e86944f65aa5f3cd99e9cb6b375fbed1c74308d
138 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript

The file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating a likely attack pattern of downloading and executing a secondary payload. The PDF differential parser also failed, which can sometimes indicate obfuscation or tampering.

Heuristics 5

  • ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Agent-36166
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
f7978a893fad65d01047bdfb64814c9046b9ca4726acd88a056873ab00440978		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 83606 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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