Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a303ae19fca0e0f…

MALICIOUS

PDF

26.1 KB Created: 2011-72-51 03:25:00
MD5: 2936aebc4769b781dcd06666a17ec263 SHA-1: 0467565362102b0073c329f4f1bfac6fedfbb467 SHA-256: 3a303ae19fca0e0f39a4ca3f2f9379ef06269c0b68b4e3adf4eecceaadccc534
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript, which is further obfuscated and utilizes an eval() call. This suggests the script is designed to execute malicious code, likely to download and run a second-stage payload. The ML classifier strongly indicates malicious intent.

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_obj0001_000.js
a595129a4aa5a3aad7ccb9ab0a71c3cbfb2495dfbd2773a2af08ff9d6d69746e
pdf-javascript-stream PDF /JS object 1 at offset 0x63DA 965 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).