PDF malware analysis — malicious · 2b48de9c8e5f9e7b

MALICIOUS

PDF

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

MD5: ac2cd90ee461f6e4782e8d634134037e SHA-1: bb2640b566ac4de8ae6d820a2031933594bb259b SHA-256: 2b48de9c8e5f9e7b876ee1c0b19b3a7f2009a21f0af2e7fbb5f5f7e574944580

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier and ClamAV detection strongly suggest malicious intent. The JavaScript appears to be designed to download and execute a second-stage payload, as suggested by the eval() call and the embedded JS stream. The obfuscation makes it difficult to determine the exact payload or final destination.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7243290-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7243290-0
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` `51007f544c5c549d7408b4ddaf41649f5c26219eca2e934fd7dea325bf1a93ce`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	9471 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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