PDF malware analysis — malicious · 99e3009870b71c98

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: 28f38c0d0fcd99851a5ed43623e4b1e2 SHA-1: 3aad67f4ba1ea2eb95f91b468c7bee351ce668ee SHA-256: 99e3009870b71c98341ecb0ff43d43479b50f0ed21790b6a9e8836b6a4ecc56c

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV heuristic firings indicate the file is recognized as 'Win.Trojan.Agent-36166'. The PDF structure contains embedded JavaScript, which is a common vector for exploiting vulnerabilities in PDF readers. The presence of JavaScript actions and JS streams strongly suggests an attempt to execute malicious code upon opening the document, likely to download and execute 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` `d4947b13f4a07bb2a82c340daa094fb22fdd0ac44c126fd706347403b2e4d55c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74740 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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