PDF malware analysis — malicious · a6f4e78d5052ea0f

MALICIOUS

PDF

12.1 KB

MD5: 3950fa05f5b5e65f4bbb03d7b786af1c SHA-1: 4c49456025eb1305395f7e65da490dc11619c400 SHA-256: a6f4e78d5052ea0fcdcba3bf4511cfb951ee8eb8782c147f4987d52c13f178a6

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'. Static analysis revealed embedded JavaScript within a PDF metadata eval stager, indicating an attempt to execute arbitrary code. The primary function appears to be the execution of this JavaScript, which is a common technique for downloading and executing further malicious payloads.

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` `a16a716ef25137b3e8bf8aeadbb618452863c0d597683e866bd7a7a96895f294`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2E71	331 bytes

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