PDF malware analysis — malicious · 4a820c993b47ca75

MALICIOUS

PDF

12.0 KB

MD5: 189effc57506cef93bd49a22ce549c5c SHA-1: 35e9e1d4d00f03b62587638e1624c9cc4c85e754 SHA-256: 4a820c993b47ca7535a91787f54bd7274e2c7e1f78a8eaab1a1065dc9231c61d

68 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF sample was flagged as malicious by an ML classifier with high confidence. It contains an embedded script payload and an embedded file, indicating an attempt to deliver a secondary exploit or payload. The presence of XFA form elements and embedded URLs, while not directly malicious, are common in exploit documents.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

Embedded script payload in PDF stream medium 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 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 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_file_obj0008.bin` `8b244493a3b4cc42110d34801444ec8f8724ab0057262e58027f25106344f48d`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	11506 bytes

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