PDF malware analysis — malicious · 7d761481b11ee968

MALICIOUS

PDF

3.3 KB

MD5: 3b102e00367e42d88d0e57b70fed1ab7 SHA-1: 94220a9200c7859e81ef899a3c06129928a222fb SHA-256: 7d761481b11ee9681b1eda3fa4a73a791e11af1ccc894f01a8a11a1fae0d603a

106 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, flagged by multiple heuristics and a critical ClamAV detection (Pdf.Exploit.Agent-36121). The JavaScript code appears to be obfuscated but is designed to extract information from the PDF's metadata (specifically the title field) and use it to construct and execute a command. This strongly suggests the intent is to download and execute a secondary malicious payload, a common technique for PDF-based exploits. The ML classifier also provides a very high confidence score for maliciousness.

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` `d067d7856a1edd3ccb325ffb0f9faace432c17af8cbe739a1b2ae6778b8eb23c`	pdf-javascript-stream	PDF /JS object 7 at offset 0xA89	365 bytes

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