PDF malware analysis — malicious · 345874233c79cccf

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: 73b633cb7696b5e4f38901a44d7da9b5 SHA-1: 19bb5c202ee4bccec2a3e6de74b421e26a95f6ed SHA-256: 345874233c79cccfdeed1327050d263b5ea574667231ade5a4eaedeb9e2ed2c0

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged by ClamAV as Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. This JavaScript is likely responsible for downloading and executing a secondary malicious payload, contributing to the overall malicious nature of the document. The specific JavaScript stream was not analyzed further due to its size and potential obfuscation.

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` `4a6f8da8ec05ef245f2df9326a15701658db12bd6ae3d13d82cfda51e650307a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74649 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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