PDF malware analysis — malicious · 32fb6020fbcd70dd

MALICIOUS

PDF

14.4 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: f104be0b3446607e270fb1626913cfa5 SHA-1: a524fc561d5842b93fdffdde153e95cedc18167a SHA-256: 32fb6020fbcd70ddfe4a7a3fb89193295f1903efb8d252038d896749a7260737

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection identifying it as 'Win.Trojan.Agent-36166'. Additionally, it contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier also assigned a very high probability of maliciousness. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common technique for this type of malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36166
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_obj0007_000.js` `3c8e51368e06e8a3316d7c043ccae4ce0da1c8231688288df4a873f56dda926f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74371 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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