PDF malware analysis — malicious · 63ea07266a5d5ee3

MALICIOUS

PDF

7.3 KB Created: 2010-09-16 18:52:20 Authoring application: Qabifagevafa (via 8f99cTiqotezozav)

MD5: 9ac2579d0d67041a8bcc6665331cb33d SHA-1: 08a98cdedd9aa67a181d6c454d5b3a08a1a278ee SHA-256: 63ea07266a5d5ee338e4890970096732b7114edb09fb4b3d896e8b34e0002a16

106 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains embedded JavaScript, flagged by multiple heuristics, including ClamAV's Heuristics.PDF.ObfuscatedNameObject. The JavaScript is designed to download and execute a second-stage payload, as indicated by its structure which includes functions for string manipulation and evaluating code. The ML classifier also strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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_obj0011_000.js` `ff85b44f7d06834e69a161aee8e28b7340c56fef50ee1649100cb6f376ea5386`	pdf-javascript-stream	PDF /JS object 11 at offset 0x1364	2324 bytes

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