PDF malware analysis — malicious · be911379f3454183

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: 9ed85bae45d890545fd2ecd2c6f4759d SHA-1: fbd09a171a54fad698d9be00611f1ad2040995d5 SHA-256: be911379f34541838a6e374769d358f9cbbdda96750014e15c75800e7ac01ad5

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious JavaScript

The file is a PDF containing embedded JavaScript, which is a common technique for delivering malware. Heuristics indicate JavaScript actions and embedded JS streams. ClamAV detection confirms this is a known malicious trojan. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as indicated by the critical heuristic firings.

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` `ff099912ea280fb0f68981447f1b060a4bc9a71e8324f7487990a62c556f5c2e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74735 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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