PDF malware analysis — malicious · 598a504d2900a74d

MALICIOUS

PDF

7.7 KB Authoring application: Qimigiwova (via 50c7dBashemeriwesohitaro)

MD5: a1fb33176f40c06b5762442e7d313f2c SHA-1: 8ea4c4a2dd70419a8dd1dcc0bdad9cd8b9630389 SHA-256: 598a504d2900a74d853f7b120cb3c388b70c8ca02953302d94a93fa66c9e57d0

106 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a PDF containing embedded JavaScript, as 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 the primary artifact likely responsible for executing the malicious payload. The exact function of the script is not fully discernible due to potential obfuscation, but its presence within a PDF flagged as malicious points to an exploit attempt.

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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