Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d654e259e6ea50…

MALICIOUS

PDF

3.9 KB
MD5: 58688bdff540bb725fca4546bd676d09 SHA-1: 2f02d159d7401555aced79b94114fd0fdb8b0c8d SHA-256: a1d654e259e6ea5043af67ecf85729fbea45b2c061a349373ca231237e092be1
112 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and utilizes multiple decoding filters (ASCIIHexDecode, ASCII85Decode) with exploit indicators, strongly suggesting it is designed to deliver a malicious payload. ClamAV detection of 'Pdf.Exploit.Agent-36178' further confirms its malicious nature. The embedded JavaScript is the primary mechanism for exploitation.

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