PDF malware analysis — malicious · 760452211f0cd6e0

MALICIOUS

PDF

12.2 KB

MD5: 9f88d2b5adc28141a44149cf073f9afd SHA-1: f488f21efcec3a6e30de1058ad600c1160256df8 SHA-256: 760452211f0cd6e0faed8c9070a05af61b7c5a0a27d891d7a06b083b229412cd

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript that is obfuscated but appears to decode and execute a payload. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of a PDF vulnerability to download and run a secondary malicious file. The JavaScript's purpose is to decode and execute a payload, which is a common technique for dropping further malware.

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` `a3c34db28127e651b901be6e5004ac3d8b5ddf88ccc36f98cce0d6e8bb373ae2`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2EAB	331 bytes

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