PDF malware analysis — malicious · 07c8e58e10736c6e

MALICIOUS

PDF

62.8 KB Created: 2006-02-16 15:03:51 -08:00 Authoring application: lice (via ubst)

MD5: 193dbbfb1fabbe9ae5369af3f711011a SHA-1: 002808b97e6145bb9fd5d4f0c52308764b9bb1fd SHA-256: 07c8e58e10736c6e9f46db7ce2b5e3c6c8d581a774ae4d8bcba18c343d606748

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, identified by multiple heuristics and a critical ClamAV detection for 'Pdf.Exploit.Dropped-94'. The JavaScript is heavily obfuscated but its presence and the ML classifier's high confidence indicate it is designed to exploit a vulnerability and execute malicious code. The primary function of the script appears to be downloading and executing a second-stage payload, as suggested by the ClamAV detection name.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `607e7ad469e8be7f3eb21403544e47b713eb0803b0f76bb64a5647b0a92e69d5`	pdf-javascript-stream	PDF /JS object 76 at offset 0x94B	53919 bytes

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