PDF malware analysis — malicious · 292240c657f10199

MALICIOUS

PDF

38.3 KB Created: 2009-06-01 13:56:27

MD5: 1529bc2f73d4513ed42fe3d1f6752fab SHA-1: 099e2d6f43d7cc112ddc98a4d246d952e1138059 SHA-256: 292240c657f10199bac9ae2fb077deae90666f89fb73ebfcb93bc962de573477

74 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF was flagged as malicious by an ML classifier with high confidence. It contains embedded JavaScript, which is further indicated by heuristics like PDF_JAVASCRIPT and PDF_JS. The embedded JavaScript file, 'javascript_obj0007_000.js', exhibits obfuscation, suggesting it is designed to download and execute a second-stage payload. The document body contains seemingly random text, which is common in obfuscated or lure documents.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

Suspicious extracted artifact medium 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.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `b7c913825138606fc1be0ccdae977b771cc8ae3c14b856f0af69ee981ee9b8b4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x320	37706 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).

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