PDF malware analysis — malicious · 3c8fb712a5752b94

MALICIOUS

PDF

2.7 KB Created: 2008-12-17 23:30:58 UTC

MD5: 27ea90261946aa6c996765e52e333dff SHA-1: 270c8aacace202a3066ffaa6707935c1e554f782 SHA-256: 3c8fb712a5752b94aab9104f0e80406add814be9feebd64aa6e98cdbe726014e

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call within the decoded JavaScript stream (PDF_EVAL) strongly suggests that the script is designed to execute arbitrary code. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves exploiting a PDF vulnerability to run this obfuscated JavaScript, which likely downloads and executes a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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_obj0006_000.js` `587e59c3610aab6e30d27df6a70955dfba03b0eb6b8f7525d8179de748000edf`	pdf-javascript-stream	PDF /JS object 6 at offset 0xB5	3793 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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