PDF malware analysis — malicious · f5c464025b09ef2c

MALICIOUS

PDF

12.8 KB

MD5: dd6a8b58119ee864b46548cbae344351 SHA-1: b62c4f9d3ce726da53c558fe0f5fedd055f1f63c SHA-256: f5c464025b09ef2caa359194735b9cb770b8b8c09b35fb40cf5f2d182d23f520

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 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 JavaScript actions and embedded JS streams, particularly a metadata JavaScript eval stager, indicates an attempt to execute malicious code. This code likely serves as a stager to download and execute 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` `417a978bddd27618205587ac360d31189932c7cef1c591ea2d61ffd3775cd7f7`	pdf-javascript-stream	PDF /JS object 76 at offset 0x30ED	331 bytes

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