PDF malware analysis — malicious · 8743bb1bcc8ceb44

MALICIOUS

PDF

2.3 KB Created: 2009-04-20 18:02:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: c7ce01b811a86fafcd0199d666fa88b5 SHA-1: b92b3d967511d23e15de83eb24a88bb6126551cd SHA-256: 8743bb1bcc8ceb4450f94172efa20e64abfdfd806782a9d60625e979a6e5553b

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly indicates maliciousness. The embedded JavaScript, named 'javascript_obj0013_000.js', is likely responsible for executing malicious code. While the exact actions of the script are not fully detailed, its presence and the high confidence score suggest it's designed to download and execute a second-stage payload or perform other harmful actions.

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_000.js` `69092cd5ad452401211cc3e2d4765932cd96211bc1f699d41b29ed84f7fc7bc0`	pdf-javascript-stream	PDF /JS object 13 at offset 0x33F	2239 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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