PDF malware analysis — malicious · b38ecde007b75f03

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: 0fa7336125709b3b4f6e13d4cc8d77e9 SHA-1: ffc7f427a8fc498ac8ff44572b9269ed618af899 SHA-256: b38ecde007b75f030fdd4cdb2cde3580d17d3cca7cbe60a5dbd73de6335192e1

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads. Heuristic analysis identified multiple JavaScript-related actions and streams within the PDF. Furthermore, ClamAV detected the file as 'Win.Trojan.Agent-36166', strongly suggesting it is a known piece of malware. The embedded JavaScript is likely responsible for 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` `6465b1970269b6024885315fb71e38b5a2f27d1bb498725e75385772b97d59cc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74646 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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