PDF malware analysis — malicious · 4d30499a56412858

MALICIOUS

PDF

14.6 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: b33df8df6f9b183bf0bb55f68c03417f SHA-1: 796d80d84023169cb243272db730fd12ffca0167 SHA-256: 4d30499a5641285807890ed50e0f8423cc6b5093e7f2ebb7090837c7ca0f7f33

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating a potential for malicious code execution. The JavaScript stream is likely responsible for downloading and executing a second-stage payload, which is a common technique for malware delivery. The heuristics indicate the presence of JavaScript actions and embedded JS streams within the PDF.

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` `c3d05d83fa3685bd7b5fc9ab5a76b02c5714bcbc3ab0d4f51686bd78b20c0968`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75192 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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