Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b71baa705f2fe42…

MALICIOUS

PDF

16.3 KB
MD5: c156e9b4436ae7113a9e8ae17ce88c1f SHA-1: 11272d9cc925bbbe3611646d1623bab1b3505c90 SHA-256: 5b71baa705f2fe42070ef1ae2cc20523c2f3e3ffd0224fc22442fee7e7dbb695
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 ClamAV detection for 'Pdf.Exploit.Agent-36324'. The JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload. This is a common technique for delivering malware via malicious documents.

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
998cf474ea00c01d25a36495a3c281c2f70d41023a56c0dfbf5089facc40c4fe		 pdf-javascript-stream PDF /JS object 76 at offset 0x2D4 15730 bytes

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