PDF malware analysis — malicious · 3a88a2f9ffdf4c5c

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: 7ac495abdac2062fd406032bceb9ff1d SHA-1: a554dbd829c6d14499962cf1387a100956d6c0bf SHA-256: 3a88a2f9ffdf4c5cad28b3c159f9dc7bb7e86cb9255e82a41aee5a559501737e

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detection as Win.Trojan.Agent-36166 further confirms its malicious nature. The embedded JavaScript, extracted as 'javascript_obj0007_000.js', is likely responsible for downloading and executing a second-stage payload. The file's metadata suggests it was authored using PDF Library, a common vector for embedding malicious content.

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` `72724ce21b0927e169b6cb8d305712d9c9f55c56be0897caa937135c662748e4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75187 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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