PDF malware analysis — malicious · a94fa9e079338aac

MALICIOUS

PDF

3.6 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 10e90de06523638db7f186806e36a74e SHA-1: 6d66f3a78eb05865e9bda1d8234bd4c3852857d7 SHA-256: a94fa9e079338aac1e8a80a1376911c330ba6ad5709583861e20a39b925c3511

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF file was flagged as malicious by an ML classifier with high confidence. Static analysis revealed embedded JavaScript containing eval() and unescape() calls, indicating obfuscated code execution. The presence of a large, encoded JavaScript blob (javascript_obj0014_000.js) strongly suggests that the script is designed to download and execute a secondary payload. The specific obfuscation techniques and lack of further indicators prevent a more precise family attribution.

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)
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.
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_obj0014_000.js` `ad13db0e0538ffd04e02c9dd107bd13328bb11906b94bb7dee2569a5fbcb9263`	pdf-javascript-stream	PDF /JS object 14 at offset 0x368	19809 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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