PDF malware analysis — malicious · 93f1239de70e7916

MALICIOUS

PDF

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

MD5: 9de067ace8636a8a788a3925533e9660 SHA-1: b088f64fc78a0b28a21b5de867f90769141ce907 SHA-256: 93f1239de70e79162aa50bfabcabd4a4c9a9ff75d06af73e2faa8649f0ba9136

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_UNESCAPE. The ML classifier strongly indicates maliciousness. The embedded JavaScript file, 'javascript_obj0014_000.js', is highly obfuscated and likely responsible for downloading and executing a second-stage payload. The exact download URL or execution method could not be confidently determined due to the obfuscation.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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_obj0014_000.js` `b128b7f1e1f3d200a1b306da2275d62811b161be79b6e24f23395af115f0f9ef`	pdf-javascript-stream	PDF /JS object 14 at offset 0x368	36858 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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