PDF malware analysis — malicious · 77d85ef437096d30

MALICIOUS

PDF

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

MD5: cb94efd1f02c318c674d7ab434007f5c SHA-1: 0c5e197b3dfcad564bfdc7ca328a79fee563987e SHA-256: 77d85ef437096d300413ed1deaed5ea7d27a6a1a9229263ca28be79dc5f77431

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, flagged by multiple heuristics and a critical ClamAV detection (Pdf.Exploit.Dropped-94). The JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload, a common technique for malware delivery. The ML classifier also strongly indicates maliciousness.

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` `5355a5983c502b9d1548fa143339da566e659ef0855a8cba26bce7730b76ea05`	pdf-javascript-stream	PDF /JS object 76 at offset 0x955	50573 bytes

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