PDF malware analysis — malicious · 184fe2f6384ce0ec

MALICIOUS

PDF

12.4 KB

MD5: eb7bfc986db5b7b07d8e4bcde43b8c0e SHA-1: 7d44cd0d3c8027bc551638e0848a08cd02c5bddb SHA-256: 184fe2f6384ce0ece6e1aafca55e6e29f29cd691b49979426a0e7964d9f156b2

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, identified by multiple heuristics including 'PDF_JAVASCRIPT' and 'PDF_JS'. The script decodes a string using a character map and then evaluates it, likely to download and execute a secondary payload. This is further supported by the critical ClamAV detection of 'Pdf.Exploit.Dropped-94'. The initial access vector is inferred as Spearphishing Attachment due to the nature of PDF 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` `7b0808d6a161de75e8d6db00c6301f5b04bbb5507ac89860f400365f2aa341b6`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2F74	331 bytes

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