PDF malware analysis — malicious · 9a98ef75dc800bfd

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: b484756c5089d2749a8b83e39beaede0 SHA-1: 2994c8574fa7c2457b113d030b0b4ba18eec705c SHA-256: 9a98ef75dc800bfd5b8b5167dd5ec096ef766c458d0ba03f1f1f68a5825c115a

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The critical ClamAV heuristic firings indicate the file is recognized as Win.Trojan.Agent-36166. The presence of PDF JavaScript actions and embedded JS streams strongly suggests the file is designed to exploit vulnerabilities within PDF viewers to execute malicious code. The embedded JavaScript is likely responsible for 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` `da4ebe52871216a31f986207c62e37f6f0d2988903a9e656b1def725a833a5ce`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75105 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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