PDF malware analysis — malicious · 8440a63c94df796a

MALICIOUS

PDF

3.3 KB

MD5: 948ac505eafb5b0a81ff7113901db4d8 SHA-1: 3d8026d69aa7ec959b87b3d673efb9593e2a9888 SHA-256: 8440a63c94df796ae51b6d4b5f43959e3fae464dc8c3a1470becce563fadd473

106 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was flagged as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Agent-36121. It contains embedded JavaScript that attempts to extract characters from the PDF's title field to construct a string. This string is then executed, indicating the script's purpose is to download and execute a second-stage payload. The presence of JavaScript and exploit detection strongly suggests a client-side execution attack.

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` `1fa22dacf825b45917915fcbd27a9145bc08e4b760e2da889d1f358eebe83d76`	pdf-javascript-stream	PDF /JS object 7 at offset 0xA85	310 bytes

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