PDF malware analysis — malicious · 37a4f4033bf8a1be

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: 9064c730593008bd2ca9c2ac9b1f7c8b SHA-1: 63cf19d403f9ec49f6be55971021c50a61a926ef SHA-256: 37a4f4033bf8a1befcf23ae5709545e289e51d73c5a89c0b20fed59292418793

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The file is a PDF document identified as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis detected embedded JavaScript, indicating an attempt to execute code. The JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common technique for malware delivery. The specific nature of the payload could not be determined due to the complexity or obfuscation of the script.

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` `9fc03a1c54e0766409fb4eee5a37a4b1fe651c4c31f48ea07175b93a51dbd9b3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75153 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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