PDF malware analysis — malicious · fe8cce8ac99ccae3

MALICIOUS

PDF

13.3 KB

MD5: b66225b21b57b8ae1b9ec79c2ab44658 SHA-1: a4202992168c8429b3051758fb324dd955c2bccb SHA-256: fe8cce8ac99ccae3a0300109bc1979dc69f1b50dcb1b51ec3bc4d1334f67b275

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

The PDF file contains an embedded script payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The ML classifier strongly flags this PDF as malicious. The embedded file artifact, 'embedded_file_obj0008.bin', is likely the delivered payload. The XFA form and embedded file heuristics suggest a potential exploit vector.

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/xci/
- 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` `26061c79ecfcbffb19878af730582f6d028f70a7111c00ba075fda807ce46d2c`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xD5	12817 bytes

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