PDF malware analysis — malicious · d85aa6a416acc125

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: ad726b0ab52b6468d31469a70b095157 SHA-1: 70a962ccf93848e9fa66185064cc5bc58c73b086 SHA-256: d85aa6a416acc12539ebb908d5e6642dd1f5e0bb8718fb03ea9a9d687680657c

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV heuristic firings indicate the file is recognized as Win.Trojan.Agent-36166. The PDF structure contains embedded JavaScript, identified by PDF_JAVASCRIPT and PDF_JS heuristics, which is a common method for exploiting vulnerabilities to deliver malware. The embedded JavaScript is likely responsible for the malicious behavior, such as downloading and executing a second-stage payload.

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` `ecece4db30c4b322cfff396453f896233f3bc1de1ec2bd6d9ab286bad47c63c0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75102 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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