PDF malware analysis — malicious · 253a895ef7495a27

MALICIOUS

PDF

12.6 KB

MD5: b48a6dad551ca2d4d6bbdc1c2c7b2fce SHA-1: 0c8075f7d9218bba00dac88e03039850accb3a10 SHA-256: 253a895ef7495a27cfa4fb2d9220da672f918c9e79f442200195d9179543adc2

146 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains embedded JavaScript, flagged by multiple heuristics as a stager for executing malicious code. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the 'Pdf.Exploit.Dropped-94' ClamAV signature.

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` `9bb4a60630ace2a3699f02e1f7bf06147fec1ce99f93349e103f1d7964c459c4`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3056	331 bytes

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