PDF malware analysis — malicious · 62e167daa6790346

MALICIOUS

PDF

6.9 KB Created: 2010-08-26 17:40:37 Authoring application: Gizohztine (via a29a7 yrlezhecuiqiwe)

MD5: 842448d971db911ae6631309a0e6ed59 SHA-1: 002c53fc2fcbb1b5625cb3dde9ba731d7bfb3db6 SHA-256: 62e167daa6790346679b861db6aa0e902a95f3929391f7ba5260c6acf5421d9a

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, identified by heuristics and ML classifiers, which is designed to download and execute a second-stage payload. The script attempts to deobfuscate strings and execute them, indicating malicious intent. The primary technique observed is the use of JavaScript for execution, likely delivered as a spearphishing attachment.

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` `4d5147beba7293d6f3b1a8dce058837b4ec228d6ef4946a988f2d1eb633c315e`	pdf-javascript-stream	PDF /JS object 10 at offset 0x12A8	1907 bytes

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