PDF malware analysis — malicious · 28b08ce459216d4e

MALICIOUS

PDF

26.6 KB Created: 2006-02-01 14:14:12 Authoring application: Wegoptyr (via HghTc6Fs)

MD5: bc4674bd443d3e92b65b86c799b77e82 SHA-1: 5dbaa5023851e8fa7610c536d5c8c06656333318 SHA-256: 28b08ce459216d4ee35e9825311d65eaf10897fe334a311be29f8eaac00a161d

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, which is heavily obfuscated and uses eval() to execute its content. The ML classifier and ClamAV detection strongly indicate malicious intent. The script's obfuscation suggests it is designed to download and execute a secondary payload, typical of a dropper. The presence of multiple JavaScript streams and the ML_NYX_PDF_MALICIOUS heuristic further support this assessment.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7242120-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7242120-0
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `287f0f9fa0a7fc424bbbcd9d15f69c547bf6eb87b1c71875ebe1429999892cd2`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EE	26117 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `ef3205d9691f872e7f596fb987b4878283d7613c851e1c3d59284c66bf117211`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EE	360 bytes

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