PDF malware analysis — malicious · 3002cf17fa1c8ae0

MALICIOUS

PDF

5.5 KB Created: 2009-10-05 22:59:14 Authoring application: Scribus 1.3.5svn (via Scribus PDF Library 1.3.5svn)

MD5: 016597bde0422e634283e4e6c2b34541 SHA-1: fbe2628fe0edc2bff574e1e2211f2851bacdf5c1 SHA-256: 3002cf17fa1c8ae0900e8908bfbad0d067b95b75a4214b7710e91feec91bb874

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious and contains embedded JavaScript. Heuristics indicate the presence of JavaScript actions, embedded JS streams, and the use of unescape() and String.fromCharCode, suggesting obfuscation. The ML classifier's high confidence score further supports the malicious nature of the file. The embedded JavaScript, named 'javascript_obj0016_001.js', is likely responsible for executing the malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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_obj0016_001.js` `698a0026e83512662d54fa5e1317d1efce1d1c22b5056e18ed3a643533f51797`	pdf-javascript-stream	PDF /JS object 16 at offset 0x75B	11873 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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