PDF malware analysis — malicious · 6e00f140eaae6021

MALICIOUS

PDF

12.6 KB

MD5: 5691290dcbcc709342cb7ef18135c5a6 SHA-1: 92acd532ffc26c263648d7b3bb3aa76e8fe172f2 SHA-256: 6e00f140eaae6021e8b66331adb1e8afa6d7c2aad4ba22a4018651e05df94aa4

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript within its metadata, which is designed to decode and execute a payload. This is further supported by high-severity heuristics indicating a PDF metadata JavaScript eval stager and a critical ClamAV detection for Pdf.Exploit.Dropped-94. The script's obfuscated nature and use of eval suggest it is likely downloading and executing a second-stage payload.

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` `cc38a4a404040112f58c5481845920e3369d31c356a2f8725475f71b944b46d2`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3063	331 bytes

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