PDF malware analysis — malicious · ab74012cd8aec4e8

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: b0bdaa4dd525c25c8e2e6113bf7850ad SHA-1: bc33b7bb3df81029aa00148ac63ab1a6832410d5 SHA-256: ab74012cd8aec4e8d2ec2a36b3ae60f98d09a8129546672afe1b5f8dcfcdae53

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The file is identified as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript within a PDF stream, indicating a potential for malicious script execution. The presence of PDF_JAVASCRIPT and PDF_JS heuristics further supports this. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, which is a common technique for malware delivery.

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` `eda1333c4874f024b5c257350e3b881bad9068b935aa5f1c8e8269dce20f5cdf`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74809 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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