PDF malware analysis — malicious · ca99063e89392a19

MALICIOUS

PDF

4.8 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: a60c050af94c42c0270a360bafae5b48 SHA-1: 56bfed1a2da37286bcf1c6914309c86caa4008bc SHA-256: ca99063e89392a191b05e6e9255e177a34b71a2470e08e15702925b19707561a

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. A high-confidence ML classifier (ML_NYX_PDF_MALICIOUS) and a PDF_EVAL heuristic firing suggest the JavaScript is designed to execute arbitrary code. The presence of obfuscation indicators in the extracted artifact 'javascript_obj0013_001.js' further supports this. The script likely downloads and executes a second-stage payload, a common technique for malware delivery.

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` `107977224f642d1f84a1709bfd597834e49fefb3924af5b9752d79f6280dcdf9`	pdf-javascript-stream	PDF /JS object 13 at offset 0x363	6618 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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