Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55cff91790d4157…

MALICIOUS

PDF

22.3 KB Created: 2009-04-24 09:54:29 +02:00 Authoring application: PScript5.dll Version 5.2.2 (via Acrobat Distiller 7.0.5 (Windows))
MD5: 53bbadbd4122732d801d0eb5b13abdc8 SHA-1: 162584c42bb2c6183e003410a85263529fd9644a SHA-256: d55cff91790d41576f45fe29d97baa592fb4cf26c77fd7f39da2f1e6c569b1f5
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains obfuscated JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript appears to be designed to execute arbitrary code, as suggested by the use of 'eval' and string concatenation to build commands. The CLAMAV_DETECTION heuristic further confirms its malicious nature. The script's intent is to download and execute a second-stage payload, though the exact URL or execution method is heavily obfuscated.

Heuristics 3

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.

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