PDF malware analysis — malicious · 793903c0af7c0024

MALICIOUS

PDF

12.6 KB

MD5: c0fedbe8882ded60de64f993165ec1cc SHA-1: 7fd971132c716adca24b34db869bbb8542e14e1a SHA-256: 793903c0af7c0024cc5b5f7e7c60369212836842253cce3eb622cdd0711bd95c

146 Risk Score

Malware Insights

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics indicate this PDF is malicious, likely exploiting a vulnerability. The embedded JavaScript attempts to decode and execute a payload, as evidenced by the 'eval' function and string concatenation used to build the payload. The ML classifier strongly supports a malicious verdict.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
PDF metadata JavaScript eval stager high PDF_METADATA_EVAL_STAGER

PDF JavaScript reads document metadata fields such as title, subject, or producer, decodes character data with parseInt/String.fromCharCode style helpers, and evals the recovered stage. This is a high-signal exploit-kit staging pattern.
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` `ef0ca987a04b463b2b4eca4c32cad0cd16db13d5fb94265a0dbd86a6bcda4934`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3066	331 bytes

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