Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e4e911d4b8687f…

MALICIOUS

PDF

146.0 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)
MD5: 0faab9021bade0c85134ec63aea6ec8a SHA-1: 67b7513f4507e295eb75a211d6cb73d9577640b0 SHA-256: 58e4e911d4b8687f97538f2dd3f67c9cd8db779b260d7694a3450cff33dc22cf
146 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. A critical PDF_EVAL heuristic firing suggests the JavaScript is being executed, likely to exploit a vulnerability. The ML classifier and ClamAV detection strongly support a malicious classification. The JavaScript appears to be obfuscated, but the presence of eval() and the overall structure point towards a downloader or exploit execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-35931 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35931
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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.