PDF malware analysis — malicious · 493b45c5f1e16b96

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: 0daa0f831a46c24b8dca44e27ae0f06b SHA-1: 3f811c7aae66b3dfccb1f7fdb1d9f12a90b35d22 SHA-256: 493b45c5f1e16b96f29ae8efcd78610068b792b66b38cde6d057d3ab89f55b5a

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A high-severity heuristic, PDF_EVAL, indicates the use of eval(), which is commonly used to deobfuscate and execute malicious code. The ML classifier strongly supports the malicious nature of the PDF. No specific IOCs like URLs or hashes were extracted, and the script content was too obfuscated to determine its exact payload or persistence mechanism.

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` `f5d2731b54a6a424235161cd3ed11e26b8c5d487d9662322459bfc6f40ea2879`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36B	6313 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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