Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c581f6d148b4a2…

MALICIOUS

PDF

16.0 KB
MD5: 002629ca1362e61c1cf1cc04dd1697b0 SHA-1: 0a3dd37128b410740f5444908d73164b0e0caf6e SHA-256: 04c581f6d148b4a26271bb8d383b89636335d9a9ea71b09cb1b38706b30f0f6d
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, flagged by multiple heuristics and a critical ClamAV detection (Pdf.Exploit.Agent-36324). The JavaScript is heavily obfuscated but appears designed to download and execute a secondary payload, a common technique for exploiting PDF vulnerabilities. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36324 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36324
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0076_000.js
a27c4d20bd8ef3a6e0ff75c17becba5c4f3c1096c88294d445b440f6a116d060		 pdf-javascript-stream PDF /JS object 76 at offset 0x2D4 15470 bytes

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