PDF malware analysis — malicious · 1e145f64e5e3d6db

MALICIOUS

PDF

4.3 KB Created: 2009-02-13 04:13:07 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 2e64c8b2c3d42b42fec572ae7c627c35 SHA-1: 826e5c9ccb8fa5e1d15c835101b5ecb5bfc90ed3 SHA-256: 1e145f64e5e3d6db0168b793cafaa4eed5e69a5368426180e5ab6876ac1e0dbf

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, which is flagged as malicious by heuristics and a machine learning classifier. The JavaScript stream is obfuscated and uses eval() and String.fromCharCode(), indicating it likely downloads and executes a second-stage payload. The ML classifier's high confidence score supports this assessment.

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_obj0013_000.js` `7d047bc0bf756944f13c56f460c8ae447fdf49de15099f6e647776991c723140`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	4578 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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