PDF malware analysis — malicious · 4f9b2a4c56fcca7f

MALICIOUS

PDF

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

MD5: bf703199126f3458954f5a3ff31cf0ad SHA-1: 6e5c0c6f573fb7e6384ca43ef28078926aafafab SHA-256: 4f9b2a4c56fcca7f1669e7e25e421fefe5638a690739df78cf38b8df0fb8696b

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly flagged this PDF as malicious. The JavaScript stream, named 'javascript_obj0013_000.js', is likely responsible for executing the malicious payload. The eval() call within the script is a strong indicator of dynamic code execution, commonly used to download and run further stages.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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_000.js` `8a7af4f38b6ac0287f87ea388dad1949ccf9c0144e481c1676b3dc8ab1fec201`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	22912 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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