PDF malware analysis — malicious · 535fb222147b321f

MALICIOUS

PDF

6.1 KB Authoring application: Favib rela (via Pipnolpamok)

MD5: 2cfc60795d1ae153c34db8a6c5f9e5ca SHA-1: 03817ab2e77563747e6a16a676e117ea12318ea8 SHA-256: 535fb222147b321f05b89527574cc60191af677cdd3223587653bfd991408ff8

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by ClamAV with the signature 'Pdf.Exploit.Agent-36174'. Static analysis also detected embedded JavaScript, indicating an attempt to exploit vulnerabilities within the PDF reader. The ML classifier strongly supports the malicious verdict. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Agent-36174 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36174
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_obj0015_000.js` `d2679f3f15d6e025ee8c17fa18b94c5a0f309ff0925fe97138da94e5b5bbdf34`	pdf-javascript-stream	PDF /JS object 15 at offset 0x1281	1504 bytes
Detection ClamAV: Pdf.Exploit.Agent-36174 Obfuscation or payload: unlikely

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