Malicious PDF / .PDF3 — malware analysis report

Static analysis result for SHA-256 f0f0ac91b40ad6d5…

MALICIOUS

PDF / .PDF3

788.0 KB
MD5: ef90f2927421d61875751a7fe3c7a131 SHA-1: 44ea3ac94b5b4913c889ffba3074a5d97f2807b2 SHA-256: f0f0ac91b40ad6d502ace6402cb7db70dcb20b25ed99e04c5a4de762dcad5ad2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1204.002 Malicious File

This PDF was detected by ClamAV as Pdf.Dropper.Agent-7322423-0. High-confidence heuristics indicate that the PDF is encrypted and uses JavaScript, likely to obfuscate and deliver a second-stage payload. The ML classifier also flagged this as highly malicious. The presence of JavaScript actions and embedded JS streams points to an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-7322423-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7322423-0
  • Encrypted PDF carries /OpenAction — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JS
    PDF declares /Encrypt and also references an executable trigger (/OpenAction). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic