PDF malware analysis — malicious · 8dc1f92538eafe6b

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: f0b29cfb6a5a5b82a84f4630c8e8c74e SHA-1: 976ea0b5043c5a62952bae9aaab592319b167d95 SHA-256: 8dc1f92538eafe6b7eb3aaa934a12c2df37dc312f37e9b0ddd3d5c33501083b5

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call (PDF_EVAL) suggests that the script is likely obfuscated and designed to execute arbitrary code. The ML classifier strongly supports the malicious nature of the PDF. While the exact payload is not clear due to obfuscation, the eval() call is a high-confidence indicator of malicious intent, likely to download and execute a second-stage payload.

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` `3e4e551b5273465aa8e47b43a1ecb81618a6daa5745b4f78dc5902fad32fe2bc`	pdf-javascript-stream	PDF /JS object 13 at offset 0x365	6315 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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