PDF malware analysis — malicious · 10d2debdf153d193

MALICIOUS

PDF

3.3 KB

MD5: 1a8e6b52f071ae4190f71b1b0cf29ef7 SHA-1: 58bde57b3bcc0d58b8cfcc23f4cd036310372d84 SHA-256: 10d2debdf153d1933f344d0696a4ac1edf94048c871f9b937c36fc62a87016d2

106 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript. The JavaScript code reconstructs a command by concatenating array elements to form 'Cmd6Dexv', then calls this function with a string derived from the PDF's title property. This indicates the script is designed to execute a command, likely to download and run a secondary payload. The specific exploit name 'Pdf.Exploit.Agent-36121' is also provided as an IOC.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 3

ClamAV: Pdf.Exploit.Agent-36121 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36121
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` `b87b9538d84c89e19c938a6f829262af35d8b923fdfb48b6311a5c6d495ac239`	pdf-javascript-stream	PDF /JS object 7 at offset 0xA87	361 bytes

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