PDF malware analysis — malicious · b753aa894f4ef6d2

MALICIOUS

PDF

12.5 KB

MD5: 5e2aa4e6c4fee773a32e2a720c8b9b4e SHA-1: f83f670b8be59f9f46a071baf8f11430d996abea SHA-256: b753aa894f4ef6d20dc835a34aafec6420434d12e6935194a3811a23b6163d7a

136 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings related to PDF JavaScript actions and streams. ClamAV detections (Pdf.Exploit.Agent-36365 and Pdf.Exploit.Agent-36364) confirm its malicious nature, suggesting it's designed to exploit vulnerabilities within the PDF reader to execute arbitrary code. The primary function appears to be the execution of this JavaScript, which is a common technique for downloading and executing further stages of malware.

Heuristics 4

ClamAV: Pdf.Exploit.Agent-36365 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36365
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_obj0076_000.js` `38e4e6642995128dc12dd0a31a97b7c2f2ab3fdc8e484a004af5b8edb0c26eee`	pdf-javascript-stream	PDF /JS object 76 at offset 0x369	11693 bytes
Detection ClamAV: Pdf.Exploit.Agent-36364 Obfuscation or payload: unlikely

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