PDF malware analysis — malicious · 73e20d170be2e557

MALICIOUS

PDF

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

MD5: 1d6e58ed7939139ee6769d630a04d0ca SHA-1: a469eb4b5c26c62e2812e97db12c0ee5f56283eb SHA-256: 73e20d170be2e557cd20abd8950255b2245e611f32b5bfb3681a1ea75aabd316

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 heuristics and ClamAV detection as 'Pdf.Exploit.Dropped-94'. The JavaScript appears to be obfuscated but is designed to download and execute a secondary payload, a common technique for initial access via spearphishing attachments. The ML classifier strongly indicates malicious intent.

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` `1ab418c5d850656b151341debec6c922c8b283095dae3010b40b6020b4311b60`	pdf-javascript-stream	PDF /JS object 76 at offset 0x955	51037 bytes

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