PDF malware analysis — malicious · c3571aea266fbfb8

MALICIOUS

PDF

2.9 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: a0275114ffbc883b191ce25d4c731745 SHA-1: 2f32459be55e919d7ddfd1a0e144c5153638202d SHA-256: c3571aea266fbfb81e0bf6cf3037dfb1c8e8f2608f5e50a59715feae6637e022

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, which is obfuscated and utilizes eval() and unescape() functions. This indicates an attempt to execute malicious code, likely to download and run a secondary payload. The ML classifier strongly flags this PDF as malicious, supporting the conclusion of a malicious intent.

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_obj0013_001.js` `a64b38c1be3225baff2e80f27354b3779839c0c7be68fa336aad85aec26030c4`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36B	3207 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).

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