PDF malware analysis — malicious · b721e1d7a719bf83

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: a3cb7610d507b74d49c56c59f90c7c2b SHA-1: 18c77a985adf821f0b0634ca2f023ed8a2aae3ed SHA-256: b721e1d7a719bf83f203d2fa17c61fc7caf047cf9c79035990c3f90fc8b68205

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The critical ClamAV detection indicates this PDF is malicious, specifically identified as Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, a common technique for exploiting PDF vulnerabilities to download and execute further payloads. The large size of the embedded JavaScript stream suggests complex malicious functionality.

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` `a34e689ab112eba303f8174734fd8fe74be1b4a17486c23f1c2ffadf1c45ec66`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74652 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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