PDF malware analysis — malicious · 31c5b5a47722271f

MALICIOUS

PDF

7.7 KB Authoring application: Qimigiwova (via f352bBashemeriwesohitaro)

MD5: c47a2f3ba7bea6b1df84dfbc0f53796e SHA-1: fe26744a9f89aca08e6ee909825026f68989e14c SHA-256: 31c5b5a47722271fda8b1d94bf39dcbdfffe6a1c8724a80f2b081e1cdf456c7b

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely used to exploit vulnerabilities within the PDF reader or to download and execute a second-stage payload. The specific obfuscated name object detected by ClamAV (Heuristics.PDF.ObfuscatedNameObject) points to a common evasion technique in malicious PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

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` `ed31b16df2b6492a4d5be85b534deca964c2f0e07a8443782787f4ed9c62c93c`	pdf-javascript-stream	PDF /JS object 10 at offset 0x1303	3192 bytes

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