PDF malware analysis — malicious · d423b93f0db3ea28

MALICIOUS

PDF

6.5 KB Created: 2010-08-28 07:57:24 Authoring application: Sejegageiqesoy (via 111eeGolbohoro sazi)

MD5: db8434142207687664f95bdacee992ee SHA-1: 80dc8123971ed9d4b94fd1e41048af5552b73efb SHA-256: d423b93f0db3ea28949cb8611ca7c201368cc45893fcc4306717011363a5864f

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript stream, named 'javascript_obj0010_000.js', is likely responsible for executing the malicious payload, potentially leading to further system compromise. The obfuscated nature of the PDF content and the presence of JavaScript point towards a common delivery mechanism for malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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` `aac1b797b7f4df3946f776d0024554d1424521045e1cc32853762bfc85b57b27`	pdf-javascript-stream	PDF /JS object 10 at offset 0x118D	1781 bytes

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