Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a2c2635be9b792…

MALICIOUS

PDF

4.1 KB
MD5: d7a8d8d4c9735c4e41251f0452e46512 SHA-1: f7ab200fa1aeae43a9acad949474bd7653b007cc SHA-256: e5a2c2635be9b792f078f6e01d0dfa17394e4dd577bcd19248c598782816f160
134 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and uses obfuscation filters like ASCIIHexDecode and ASCII85Decode, which are common techniques for delivering malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to exploit a PDF vulnerability and execute a secondary stage.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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

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