PDF malware analysis — malicious · 5f841a07e4287863

MALICIOUS

PDF

16.0 KB

MD5: d53f8aa432a9cff4d92ba3168f5eb169 SHA-1: 10ebdd33991e6414a6e1955649918c7aece7f4ed SHA-256: 5f841a07e4287863d1931da6021123ac08ae38f89d694b3b69a9d4bc3dfd3994

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.Agent-36324). The JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload. The ML classifier also strongly indicates maliciousness. Given the nature of the embedded script and the exploit detection, the most likely attack pattern is a spearphishing attachment leading to client-side exploitation.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

ClamAV: Pdf.Exploit.Agent-36324 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36324
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` `780e22394716a6d8d8896a9902b2115d4d9a1291ed78ffcde578114d45e40f71`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2D4	15447 bytes

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