Malicious PDF — malware analysis report

Static analysis result for SHA-256 af841793649dd6d5…

MALICIOUS

PDF

4.6 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)
MD5: c2d80b13dbca677b529ca9875c12133e SHA-1: 60bb8563abccd3ed89990b7d64245cf495566111 SHA-256: af841793649dd6d5f6b1e978525091cf038a79c3eebf2efa2c66baf2d31f569d
88 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

This PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call (PDF_EVAL) suggests obfuscated code execution. The ML classifier strongly flags this as malicious. The embedded JavaScript file, 'javascript_obj0013_001.js', is likely responsible for downloading and executing a second-stage payload, contributing to the overall malicious intent of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0013_001.js
acc978031a0aca172e2473ea3568d7666c1d0308a61ba751a2a19930fed667cd
pdf-javascript-stream PDF /JS object 13 at offset 0x367 6332 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s).