PDF malware analysis — malicious · bfc1a140f6de0d64

MALICIOUS

PDF

13.2 KB

MD5: beaa3e02608bd1ae4e0f4814f93e9506 SHA-1: e11fe1130612a426f490bf2c72cea3f057fc391f SHA-256: bfc1a140f6de0d6415cc04b740df8154b4ed932ecd4d5550dc4d9c2d5fefda19

146 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, which identified it as 'Pdf.Exploit.Dropped-94'. The presence of embedded JavaScript, specifically a metadata eval stager, indicates an attempt to execute arbitrary code. This JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

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` `75396e428fcd5ec5ce75c33f021f4ea02eaa3afb98177e6d8f39a97f6ffae190`	pdf-javascript-stream	PDF /JS object 76 at offset 0x32B9	331 bytes

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