PDF malware analysis — malicious · 062f7cb67644391b

MALICIOUS

PDF

3.2 KB

MD5: 33b50999338ed74db42e661a7f4ff9eb SHA-1: e5acebfc233a2abdaa245f8b0e465a0677fb5954 SHA-256: 062f7cb67644391bc0d3a44949a0ad4e6bedc95e702a208a97c4829e6c5b14da

206 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 that utilizes the unescape function, a common indicator of exploit code. The JavaScript appears to be designed to execute arbitrary code, likely downloading and running a secondary payload. ClamAV also detected this file as Pdf.Exploit.Agent-36121, further confirming its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Exploit.Agent-36121 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36121
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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` `ebbe6b3cd1cd519c6b631c05838f82b7c2c14aa94518ed7a5ff9f437b51ea54b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x9CF	435 bytes

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