PDF malware analysis — malicious · 5c56b02bf5d75ad2

MALICIOUS

PDF

100.4 KB

MD5: cd908a1b21031a069cabfcc4fb2f90a2 SHA-1: 67e0fa60c6b0a2aca159b15749cb069e6849986a SHA-256: 5c56b02bf5d75ad26783787e859c3c9e0fbdd9dc06960a2e30e526ea694694e4

108 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier, containing an embedded JavaScript payload within an XFA form. The script appears to be obfuscated but is designed to execute, likely downloading and running a second-stage exploit or malware. The benign URLs present are part of the XFA schema and do not indicate malicious intent.

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://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00000246.bin` `a8c654ea63ebaa1629723ac18370aa8a2cf571592d5d0eed36cc80d135331a72`	pdf-embedded-script	PDF raw stream script payload at offset 0x246	102040 bytes

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