PDF malware analysis — malicious · 9bcec45f9ac17372

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: 66bba7b9c54de9ddb92d131fd64c2ffd SHA-1: 303e2041c7abcbd6f8df793c9439be2589d76dfd SHA-256: 9bcec45f9ac17372854b19a0742446aeb1692b00e5c534dda8d18ae75700edc5

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, which is a common technique for executing malicious code within PDF documents. This script is likely responsible for downloading and executing a secondary payload, contributing to the overall malicious nature of the file.

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` `ff8526c53a6f7dd1dd1424f6611f434c2c03df04f0ff9212be6cd240cfbfa229`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74368 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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