PDF malware analysis — malicious · 2599626460eb7072

MALICIOUS

PDF

12.3 KB

MD5: a0bf49b628dd123dc8501bf01be77972 SHA-1: f783024c3d497832a51314838294020cf0aecc4a SHA-256: 2599626460eb70726faf4252effc98c81a23d0ef95fb6758d8b15165b6768eee

146 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, flagged by multiple high-severity heuristics including 'PDF_METADATA_EVAL_STAGER' and 'ML_NYX_PDF_MALICIOUS'. ClamAV also detected it as 'Pdf.Exploit.Dropped-94'. The embedded JavaScript is likely used as a stager to download and execute a secondary payload, a common technique for PDF-based malware delivery.

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` `7aa8c1d60ad457c6974641ac0c1441d76316ee61689e46832a592d198d952fcb`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2F2C	331 bytes

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