PDF malware analysis — malicious · 1ac15a845c74e013

MALICIOUS

PDF

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

MD5: 09db4c9a2ef2143195cdb1ee7061271f SHA-1: f10edc4e335cd2090bde2903e434fa168517bf11 SHA-256: 1ac15a845c74e0131aee61d8ebd79205e53efc72a425592435db8f31cc4d4858

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call within the JavaScript stream (PDF_EVAL) strongly suggests that the script is designed to execute arbitrary code, likely to download and run a second-stage payload. The ML classifier also flagged this PDF as malicious with a high probability. No specific family could be identified, but the technique is common for PDF-based malware delivery.

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` `3772b5cb6e8e10a7bdf92503c1a65dbc8a717b701b926cd02273a59c9813883d`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36A	6336 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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