Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c9703a6ccf74d9…

MALICIOUS

PDF

3.9 KB
MD5: 42b612707476be867b9d028e480b63c9 SHA-1: f45e8fe8b84d044f4c7dcf69cfc1855c36c29787 SHA-256: a8c9703a6ccf74d97d8d14b09575d68a61efd4e9b33884fe0db8033cd1af903c
112 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, which is obfuscated using ASCIIHexDecode and ASCII85Decode filters. ClamAV identified this as Pdf.Exploit.Agent-36178, indicating a known exploit. The embedded JavaScript is likely responsible for executing a malicious payload.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36178 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36178
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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.
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
  • ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85
    ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation