PDF malware analysis — malicious · 5f4637b3ebb11b59

MALICIOUS

PDF

7.3 KB Authoring application: Tooqimeqipigafara (via e1ae1Renizaxizo)

MD5: 85736c2913aefefc24617497ca8487c7 SHA-1: 0943df475db3be64ca8c8a9a03ac1beac6d07437 SHA-256: 5f4637b3ebb11b59e0788180bd4ee293ef6cd3736f0ac061b9d0478f018a6d3e

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, as indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier and ClamAV detection further confirm its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for initial compromise via malicious documents.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 3

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_obj0010_000.js` `b53e27bbdeba8c818850cc3826b3d643c06114ca0ccd161a827d53f8e26598c4`	pdf-javascript-stream	PDF /JS object 10 at offset 0x130D	2214 bytes

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