PDF malware analysis — malicious · 15bb22f5c64d7819

MALICIOUS

PDF

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

MD5: 12706f0a939850bd69f2f9e4eec4ca2f SHA-1: 5e3a3813c4d22c91dd0cd72cec78fe907f402413 SHA-256: 15bb22f5c64d7819988b27f8b0bd9686169a147fd78521b02a94cdb5ad151088

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV specifically detecting it as Win.Trojan.Agent-36166. The presence of embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics, suggests an attempt to execute code within the PDF viewer. This JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for this type of threat.

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` `03647e218afec6d551f8748b7cd78cace6841180e5f17cae42ca405f8944495e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74825 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.