PDF malware analysis — malicious · 1c8a6d6a02cc1db9

MALICIOUS

PDF

10.6 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 0488be5c59b14e7098e4e78c6745a41a SHA-1: 78e38f7426adb3df84057dadd6ec8f5007be3003 SHA-256: 1c8a6d6a02cc1db9ac748b31a904aec7e674a88ef15829f121e1b879c8c87d1e

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF contains embedded JavaScript that utilizes eval() to execute obfuscated code. The ML classifier strongly indicates maliciousness. The script's structure suggests it's designed to download and execute a secondary payload, a common technique for initial access. The presence of PDF-specific JavaScript actions and embedded JS streams further supports this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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` `caa795e05bcd14e7e1aae554262b6ed6963a75c1d3a338c81dba386936873ebe`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	9333 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).

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