PDF malware analysis — malicious · 3d31f4c8093d7261

MALICIOUS

PDF

13.5 KB

MD5: d31aa5484734ac679b221eccfd1d3b1f SHA-1: 962a5842fa2423b0881e6987c88099f13142e7d1 SHA-256: 3d31f4c8093d7261560a4567d9eaf5ecd62a9ac14fa35a0e504a107c8d0e2e14

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The ML classifier strongly indicates this PDF is malicious. The presence of an embedded script payload and an embedded file suggests it is designed to execute malicious code or download a secondary payload. The XFA form structure is also noted, which can sometimes be leveraged for exploits. The embedded URLs are likely related to the XFA structure or potential command and control.

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` `a6136d69934fabea148da408f4d7f47679ed38c25d9d69f0f6a4446680272b16`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xD1	13047 bytes

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