PDF malware analysis — malicious · e0cbbce741bbea6a

MALICIOUS

PDF

13.0 KB

MD5: fdb5d5f7de40d046b9ea1ab4dea792a0 SHA-1: e6a2440497313567ff2cee69ff49809a5b335d3f SHA-256: e0cbbce741bbea6a0b6e61cf764d60f3feb4f6deabc60261f4e905348e1d81ee

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The PDF_METADATA_EVAL_STAGER heuristic indicates that the JavaScript is used to decode and execute further code, a common technique for dropping secondary payloads. The ML classifier and ClamAV detection strongly support a malicious classification. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as indicated by the 'Dropped' component of the ClamAV detection name.

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` `91e76467ba6cf75a5318dc8c6ed1f2ca7a6d750ecd9b1fb5785ad28e67e14f3f`	pdf-javascript-stream	PDF /JS object 76 at offset 0x31DA	331 bytes

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