PDF malware analysis — malicious · 99202d2cde1b8c7c

MALICIOUS

PDF

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

MD5: f484212cab57859bed08a16ae9b121b1 SHA-1: ba93d1b7b1ac02a7cb459f7d5058260da6c60bed SHA-256: 99202d2cde1b8c7ce8f08d1223cc4a68bc83a294775d1e9a9a314684aaa3ad9c

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by multiple engines, including a high-confidence ML classifier and ClamAV, which identified it as 'Win.Trojan.Agent-36166'. The presence of embedded JavaScript, indicated by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics, strongly suggests that the script is responsible for executing the malicious payload. While the exact actions of the script are not detailed, its presence in a malicious PDF points to a common delivery mechanism for malware.

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` `bb3201fda83b420afeff55f89631e3513fa149e1b08493786e3d38857ac6c07e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	76081 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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