Malicious PDF — malware analysis report

Static analysis result for SHA-256 2460024ca8cdfcf9…

MALICIOUS

PDF

14.8 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)
MD5: b6b654721f0978f9f87b56229112e5fd SHA-1: 388b13c562e5cb3a5a36dab86e4bf169ddf3d212 SHA-256: 2460024ca8cdfcf9bea91dc134d5c3a693834e1bf54c31da980e4fe8237d538f
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript with multiple obfuscation layers, including the use of eval() and string concatenation. Heuristics indicate a high likelihood of malicious JavaScript execution. The ClamAV detection of 'Pdf.Exploit.Agent-36118' strongly suggests this is a known exploit. The script's intent is to download and execute a second-stage payload, as indicated by the eval() calls and the ML classifier's output.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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_000.js
466320c78b37e07c9bd3519ecb9f6153e1ecd7ef1bcbb5799045d2242732e98d
pdf-javascript-stream PDF /JS object 13 at offset 0x336 13582 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s).