PDF malware analysis — malicious · b270a37b7780e00e

MALICIOUS

PDF

6.7 KB Created: 2010-09-01 09:19:50 Authoring application: Coqilzd (via b8b23Vezipovade)

MD5: a92b1b998bb5239136b0ab8cd2899619 SHA-1: 62a86dea0976eb4d99bebd3e6cc73351e54aa19a SHA-256: b270a37b7780e00e6001dae3ef2148fdd251156f8afb5faaf50ff3b6b06aa335

76 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a PDF containing obfuscated JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics, and ClamAV detection. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute malicious code. The exact nature of the payload is not discernible from the provided evidence, but the presence of JavaScript actions strongly suggests an attempt to download and execute a secondary stage. The authoring application 'Coqilzd' and the creation date are also noted.

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` `079179f2b5d2111982b6d25d3e16180f95f8876fd2c529b41f4158f5012771c5`	pdf-javascript-stream	PDF /JS object 11 at offset 0x121D	1942 bytes

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