PDF malware analysis — malicious · 31d5a5c221d1bbe4

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: a3a7600e9ec0d5fa40f42fd83cfc1c51 SHA-1: d69ae646b103dab3feac5d1cbd4cc6e59dd1fda4 SHA-256: 31d5a5c221d1bbe439deef5bb971eff4b271959d3cedb9d1a7a7bcb830737e09

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating the file's likely purpose is to download and execute a second-stage payload. The presence of PDF-specific heuristics further supports the malicious nature of the document.

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` `80a87d71a1af575c56924a6ac5e41bc7b521f72330d8fa940859c7dfa09c4c24`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74779 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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