PDF malware analysis — malicious · 2f1b4e38f3005e95

MALICIOUS

PDF

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

MD5: d8c5afd61618d997de173d8feda37191 SHA-1: 0fd813e53c0f665b98d7261e5f7d506d8fd05bf2 SHA-256: 2f1b4e38f3005e95392f46f24fef0337f6a4ef97ff3baa0cb2f53dcd8cfb3feb

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests the use of eval(), a common technique for obfuscating malicious JavaScript. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript is likely designed to download and execute a secondary payload, contributing to the overall malicious nature of the document. No specific family could be identified.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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` `3eda0833e9d3caed8ce92559d9033c8ea1071b136be78a4310a1a4c8dcc28611`	pdf-javascript-stream	PDF /JS object 13 at offset 0x365	6511 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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