PDF malware analysis — malicious · b243e4167bca990a

MALICIOUS

PDF

13.3 KB

MD5: 54e59d065c9f16b6625bf5912868d386 SHA-1: 48ddc29f40405498546ea2991eacb0b309830a96 SHA-256: b243e4167bca990ad35ada1f5eb8b313a56abc2a67bb49e046104c4ef1d568bf

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 confirm its malicious nature, identifying it as Pdf.Exploit.Agent-36722 and Pdf.Exploit.Pdfka-9. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute malicious code.

Heuristics 4

ClamAV: Pdf.Exploit.Agent-36722 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36722
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` `441ba75afc53cc41fc4d4bfe996b27f4aa9d805ff831042552792a3761c21ba3`	pdf-javascript-stream	PDF /JS object 76 at offset 0x369	12466 bytes
Detection ClamAV: Pdf.Exploit.Pdfka-9 Obfuscation or payload: unlikely

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