Malicious PDF — malware analysis report

Static analysis result for SHA-256 994fedd6a1a6459c…

MALICIOUS

PDF

11.7 KB
MD5: 0b2413751a5f755f4b8569a053c20d00 SHA-1: a57e28df29e64b23b06d3cbb79a0a57e8697c839 SHA-256: 994fedd6a1a6459ce9548a9a2eecd89d49f3652a4ea4376fcebc69687e21b299
74 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious File

The PDF contains embedded JavaScript and uses ASCIIHexDecode and ASCII85Decode filters, which are common indicators of malicious PDFs. The ML classifier strongly flags this file as malicious. The presence of JavaScript suggests an attempt to execute code, likely to exploit a vulnerability or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85
    ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation