PDF malware analysis — malicious · a04cc6e0e5c1e491

MALICIOUS

PDF

6.1 KB Created: 2008-12-03 13:57:41 UTC

MD5: b6391b514006f1e9ec8bdf4dfadbe8e9 SHA-1: cc166599595bc3ce9ceb046b7b8b13fae00549e4 SHA-256: a04cc6e0e5c1e49102c24edeedeb073d434b1e473ea626a01528986a1982ea71

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The presence of an eval() call and String.fromCharCode suggests obfuscated code execution. The ML classifier strongly flags this PDF as malicious. While the exact script functionality is obscured, the overall pattern points to a malicious PDF leveraging JavaScript for exploitation.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
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. (matched inside decoded stream)
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.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `0db5669a90327c02fc6857046acc9356be3a58dbb975707b6e2af0513dd57061`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC5	9737 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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