Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db8aae9f7105874…

MALICIOUS

PDF

4.7 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)
MD5: c2cd9a62913cc78f184b0cfdf23cdb42 SHA-1: 433d333c081b7b2f192d165b83a67779d4205ae0 SHA-256: 2db8aae9f710587445b4ad18e644a87246f5ab6467aed26dc0607a5b89724723
88 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL firing suggests that the JavaScript is being executed, likely to exploit a vulnerability within the PDF reader. The ML classifier strongly supports a malicious classification. The embedded JavaScript file, javascript_obj0013_001.js, is the primary artifact, and its execution is the most probable attack vector, likely leading to the download of additional malicious content.

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
17b81674f9a681b33c9d60d4d03f97cf916f893bb265f22574d54810a8fd831d
pdf-javascript-stream PDF /JS object 13 at offset 0x369 6503 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s).