PDF malware analysis — malicious · c0f1f440977378c7

MALICIOUS

PDF

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

MD5: 5664bd7932c9ffbf1c15d51ccfdfbcd7 SHA-1: 3b92ddb766a94aa9134d94ebb931dc395c00df20 SHA-256: c0f1f440977378c7347bb434276b4b610c463a284fdd9143b8b12e52885e68bf

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. This JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for malware delivery. The document body was unreadable, so the rationale is based solely on the script and ClamAV detection.

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` `aeb0c36ab2c8a50e1088052ba9e8e50c3cf0ece359fe8af1f8a93c03136e0f6b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	76570 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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