Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b5d4a0ac58c8a8…

MALICIOUS

PDF

3.8 KB
MD5: 8b8dcd926466e30b2d037359125f7ef2 SHA-1: 160f93ce144155652b0d1ee8c369507eee01057d SHA-256: 24b5d4a0ac58c8a81c1d29d433abc063dcadc15a1917f1e3381ba5ccb0fdd5a7
112 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/Shell Script Execution: JavaScript Execution T1204.002 Malicious File: Malicious JavaScript

The PDF file contains embedded JavaScript and utilizes ASCIIHexDecode and ASCII85Decode filters, which are common indicators of exploit attempts. ClamAV detection as 'Pdf.Exploit.Agent-36178' strongly suggests malicious intent. The embedded JavaScript is likely responsible for executing a malicious payload, although its exact function cannot be determined due to obfuscation.

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