PDF malware analysis — malicious · 06554055f21a5905

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: 524c831c9985bc0f2615f3208f3be6aa SHA-1: 142af5723b1e0f26f2bb1297a22dd5c95aec2a8c SHA-256: 06554055f21a5905f71bb2fdb471cd9640d3a5f92632dd6a76052771ab568db7

166 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The embedded JavaScript, although obfuscated, is likely responsible for downloading and executing a second-stage payload, as suggested by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristic firings. The specific detection name 'Win.Trojan.Agent-36166' is the 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` `5aa540b55ab434d87ca33d2e88f9b19d6a19b64df573201f9cefb9350f0adc53`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74718 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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