PDF malware analysis — malicious · 02f4abbe76c8f152

MALICIOUS

PDF

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

MD5: f65c52cd5d237c9dde32c270ec2c85f2 SHA-1: 48ea6b77fb4e11a9c20d0b94a9eec041d2d7c3d7 SHA-256: 02f4abbe76c8f1528e986ab5e52f605f1ea5cd19ba6989389886361ef0e1b363

166 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded JavaScript, although obfuscated, is designed to download and execute a secondary payload, as suggested by the heuristic firings and the nature of the script. The ClamAV detection name 'Win.Trojan.Agent-36166' is included as a primary IOC.

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` `a1344d06aac96914f2eeaec23d67766164ca2051883e5796a29b527c6784a7c6`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75160 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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