Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabefee36596a42a…

MALICIOUS

PDF

3.9 KB
MD5: 6963bef2d953b6f380fb628a6327b1b1 SHA-1: 60e108ec3f707c8ab78ef3181e957b6bf0d80245 SHA-256: cabefee36596a42a3b3ac163c736848dc92edbd9b11e6e673f55e7f0b45cf920
112 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings related to PDF JavaScript actions and streams. The presence of ASCIIHexDecode and ASCII85Decode filters, along with ClamAV detection as 'Pdf.Exploit.Agent-36178', strongly suggests it's designed to exploit a vulnerability and execute malicious code. The document body is unreadable, but the technical indicators point to a typical exploit delivery mechanism.

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