PDF malware analysis — malicious · 543cee3ec3acec4f

MALICIOUS

PDF

12.6 KB

MD5: 4fe2191d8c069403abd9b378bd022f98 SHA-1: 78e086f7d7b05d11fb0234650c12b8ae86cba2c2 SHA-256: 543cee3ec3acec4f6c4d74a3b2e25ea5112beaf26b5716c301eb136399da9217

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, identified by multiple heuristics including 'PDF_JAVASCRIPT' and 'PDF_JS'. A critical heuristic, 'PDF_METADATA_EVAL_STAGER', indicates that the JavaScript in the metadata is used as a stager to decode and execute further malicious code. The ClamAV detection 'Pdf.Exploit.Dropped-94' further confirms its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for exploiting PDF vulnerabilities.

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` `3ada382368f3a3b9fc57a9fa22920565cfc2d9d8349608d8278942ecee972590`	pdf-javascript-stream	PDF /JS object 76 at offset 0x303D	331 bytes

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