PDF malware analysis — malicious · 494fd41f9be6e85c

MALICIOUS

PDF

7.3 KB Created: 2010-09-16 18:52:20 Authoring application: Qabifagevafa (via 6a74dTiqotezozav)

MD5: c0329105721f9cf9e60093b966f90fd9 SHA-1: b1c9363a13b499b5deb81841cec56bef888e0a04 SHA-256: 494fd41f9be6e85cc7f3a2c82fd898be6ad244944177d2dc0b27f24c8e3e372d

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML_NYX_PDF_MALICIOUS classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely responsible for executing malicious code, potentially downloading further payloads or exploiting vulnerabilities within the PDF reader. The obfuscated nature of the document body and the presence of JavaScript point towards a delivery mechanism for further stages of an attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9950

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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