PDF malware analysis — suspicious · 86c4a7578cace894

SUSPICIOUS

PDF

57.9 KB

MD5: 98af151bb0a402903a2a4bb073deaa8d SHA-1: 0cacc563bbe33326136a9c153038ab756209e0f7 SHA-256: 86c4a7578cace8940196749b0f368a613c9e279d1d0d16a3b4b32708174b64fa

56 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript within an XFA form, indicated by the PDF_XFA and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. The ML classifier strongly flags this PDF as malicious. The JavaScript appears to be obfuscated but is designed to reconstruct and execute a payload, likely downloaded from a remote source, although no direct download URL is present in the provided evidence. The embedded artifact is a script payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 4

Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_000002da.bin` `a6b03a4382d83786e68b2009932f79f2e933c4a43fb11bc5f6969d92e5404d7a`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x2DA	54389 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.