PDF malware analysis — malicious · 0408e4e9131b6fbe

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: 1b8a9421edec737c2b541858d1287245 SHA-1: b1c49e8d19b6e2b259a4c4317bedc20b03a4aaeb SHA-256: 0408e4e9131b6fbe2ba5133a0418bb735477aaa855b6dbf6346665a60ff46dc0

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged as malicious by multiple heuristics, including a critical ClamAV detection for 'Win.Trojan.Agent-36166'. Embedded JavaScript was found, which is commonly used to download and execute further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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` `a04be67fa92991e7326c0b5ade388bc107b0376e823806b92bf51d5c3139ff7f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74936 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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