Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf9480f9d022f73…

MALICIOUS

PDF

59.2 KB Created: 2006-02-16 15:03:51 -08:00 Authoring application: lice (via ubst)
MD5: 1469a3710c8da81eb51ea36ffecb6619 SHA-1: 15e8afb02de8d16ec2244595e4ad999661a87382 SHA-256: 6bf9480f9d022f73a28e0aefa71f295ec1fa65f5be8cee9d19257a559a7d9324
106 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Exploit.Dropped-94 and a machine learning classifier indicated a high probability of maliciousness. The embedded JavaScript, although heavily obfuscated, is designed to download and execute a second-stage payload. The presence of JavaScript actions and embedded JS streams strongly suggests exploitation for client execution, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
  • 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
6c94da0b5cceecf8325da118eb14f2896997243b068cfd82906fd88ba9e20a6b		 pdf-javascript-stream PDF /JS object 76 at offset 0x955 50642 bytes

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