PDF malware analysis — malicious · b54b6cd0b5fe9ba1

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: 21a967d6c587868acbc68495b0f19c7f SHA-1: f48edb745b18290246506d2f6bbd7336e764b8a9 SHA-256: b54b6cd0b5fe9ba17703d8a2a2c4330f53c7d1fe02f7658edf14198fbf738a4d

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, evidenced by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristic firings. The critical ClamAV detection of 'Win.Trojan.Agent-36166' on both the main file and an extracted artifact strongly suggests malicious intent. The embedded JavaScript is likely responsible for the malicious behavior, potentially downloading and executing a second-stage payload.

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` `2d35cd5ef77a02c82f7f27f4f88a40a625e9d02733a87be2dce243db1cd15a2e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74800 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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