PDF malware analysis — malicious · 18d8617fb6b76264

MALICIOUS

PDF

97.3 KB

MD5: 741472998b9e53e393a0a6787c201142 SHA-1: 89ba05ae909b62fe08cc7279ebb71106543034fd SHA-256: 18d8617fb6b76264181691eeb9be282b829f324650032c173687d4f0a5f10f02

108 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains an embedded JavaScript payload within an XFA form, a common technique for exploiting PDF vulnerabilities. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded script is heavily obfuscated but appears designed to download and execute a secondary payload, as suggested by the heuristic firings and the nature of XFA exploits.

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_0000026a.bin` `f7ad9091a1a4dd05bdfe80e6dd244146bed0901375409822cd6faeb5136796ec`	pdf-embedded-script	PDF raw stream script payload at offset 0x26A	98867 bytes

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