PDF malware analysis — malicious · 67cbd71c886063d3

MALICIOUS

PDF

12.8 KB

MD5: 118be38187390e9a17e3648fe395b8a6 SHA-1: ba02c537872b11640a0683dd0be1d6c6ff19a3ec SHA-256: 67cbd71c886063d3b6d2d63680a828f2d019ac6699bdba05c745674ec05fae68

108 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is identified as a malicious PDF by ClamAV and an ML classifier, with heuristics indicating the presence of XFA forms and embedded JavaScript. The embedded script, although obfuscated, contains JavaScript code that likely attempts to download and execute a secondary payload. The presence of XFA and embedded scripts points towards exploitation for client execution, and the overall nature suggests it was delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00000359.bin` `24711dbfbf4d5666dca665554b0a70abbdddfa402dba302888ce8c14795ff7c6`	pdf-embedded-script	PDF raw stream script payload at offset 0x359	12328 bytes

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