Malicious PDF — malware analysis report

Static analysis result for SHA-256 25dad153d0184dc3…

MALICIOUS

PDF

26.6 KB Created: 2006-02-01 14:14:12 Authoring application: Wegoptyr (via HghTc6Fs)
MD5: bc3a9ef3f5d723d1eede27a32577759a SHA-1: 41d65a78a84661579464b5d4da7943d0f91cadab SHA-256: 25dad153d0184dc331ef3e0e0ab912102f1a77c9324bd72c48f076d9177ea3ff
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by ClamAV as Pdf.Dropper.Agent-7240628-0. Static analysis revealed embedded JavaScript streams, including one with significant obfuscation and an eval() call. This indicates the script is likely designed to download and execute a second-stage payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-7240628-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7240628-0
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
321e8c3599202b475e0a38802fa0a83b70b76ad88e75a6d4d628fdc433ea0537
pdf-javascript-stream PDF /JS object 7 at offset 0x1EE 26126 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
javascript_obj0007_001.js
8e6a263cf107b8f17bfd4b296655ec4323a5d29d9cfe360fccf838bf6231c9d3
pdf-javascript-stream PDF /JS object 7 at offset 0x1EE 25221 bytes