PDF malware analysis — malicious · 5179c675d40b5f80

MALICIOUS

PDF

12.2 KB

MD5: 9962a20accf4c39ae2bd3ed23c694ddd SHA-1: 54d43dcdbb14676f654ad00c49494db344f75503 SHA-256: 5179c675d40b5f8065edd6b7114f6d324e38be19759d3ef0b2e741f7e3f56aa5

166 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection (Pdf.Exploit.Agent-36365) and an ML classifier. It contains embedded JavaScript, which is likely used to exploit a vulnerability within the PDF reader. The embedded JavaScript file, 'javascript_obj0076_000.js', is the primary indicator of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Agent-36365 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36365
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` `d87a1947de89747848573a56d6bfbb38a7d182c981db4d5a9ebc4bf8a6999051`	pdf-javascript-stream	PDF /JS object 76 at offset 0x369	11347 bytes
Detection ClamAV: Pdf.Exploit.Agent-36364 Obfuscation or payload: unlikely

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