PDF malware analysis — malicious · 32932579bbd38c94

MALICIOUS

PDF

22.9 KB Created: 2011-72-51 03:25:00

MD5: 9946a395b9c2a8fde4babd47dd8cb9e3 SHA-1: 774c8a6743216da6c0aeef71d0e1d3093021f0e9 SHA-256: 32932579bbd38c940a65410957206b6e60548547638ab2cf900cb0bce0ba2792

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, which is flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The presence of a high-severity PDF_EVAL rule indicates that the JavaScript is likely obfuscated and uses eval() to execute arbitrary code. The ML classifier strongly supports the malicious nature of the file. The embedded JavaScript file, javascript_obj0001_000.js, is the primary IOC. The script's intent is to download and execute a second-stage payload.

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_obj0001_000.js` `5790e34014fd921a0210118a5ae7039347a772515c05539ffd8afbef5776bc99`	pdf-javascript-stream	PDF /JS object 1 at offset 0x5818	643 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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