PDF malware analysis — malicious · 44c7be615f61d3aa

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: c0753d5bb18f44a9df59fb313b82656a SHA-1: d549b02afa38aacd39f76198a6dfec6b8847887e SHA-256: 44c7be615f61d3aa3b80b128eb8efe63e333aee68d7b1feafccd4a080984532c

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF document contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call within the JavaScript stream, flagged by the PDF_EVAL heuristic, strongly suggests that the script is designed to execute arbitrary code. The ML classifier also confirms the malicious nature of the PDF. The script's obfuscated nature and the use of eval() point towards a downloader or a similar first-stage payload execution.

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` `86cbd00b0059db9d6377af7d3ca50174a7a286177dcd9aac4505e66620e3e8c5`	pdf-javascript-stream	PDF /JS object 13 at offset 0x363	6281 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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