PDF malware analysis — malicious · 265614a3486d82f4

MALICIOUS

PDF

12.8 KB

MD5: 04a121fad76ecd735ad769ce8d86ee17 SHA-1: 0be18e5ab38369768eccfdca8ce32f3aec4c2820 SHA-256: 265614a3486d82f4f7671e159d65e2b5cecf68ddb03cc57ad4370a9b97d1fcde

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, identified by multiple heuristics as a stager within the metadata. This JavaScript is designed to execute malicious code, as indicated by the ML classifier and ClamAV detection. The primary function appears to be downloading and executing a second-stage 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` `d97625ab0933839110f37fb1e62b1f8564a3e04fee6e8d75467e4b7ad7dd72aa`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3104	331 bytes

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