PDF malware analysis — malicious · 3e90c2557aff2aec

MALICIOUS

PDF

12.2 KB

MD5: f9096aa430902644c37df9f1f6174341 SHA-1: b5c592af14b62f58d485ef022c1d0d3900aea746 SHA-256: 3e90c2557aff2aec4573e14c1a8e68e70c6c45d918b872080cddc31d86d7f914

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is flagged by multiple heuristics and ClamAV as malicious. The embedded JavaScript is likely intended to exploit vulnerabilities within the PDF reader or download a secondary payload. The ML classifier strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Js.Exploit.HTML-28 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Exploit.HTML-28
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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_obj0076_000.js` `90a445864779f7b425cf22aaf730072a63b061a508000e4d69552f485e3261fb`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2C2	11526 bytes
Detection ClamAV: Js.Exploit.HTML-28 Obfuscation or payload: unlikely

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