PDF malware analysis — malicious · 224e3d6d5840e650

MALICIOUS

PDF

13.0 KB

MD5: bac8aadd869f24c7aa7b7141f66334ce SHA-1: fe1aaee0b0312cf284ae2533cdf9e377782ceebe SHA-256: 224e3d6d5840e65098eea3f4f696907c123ce03aef4ab7ca6b2df9fd35aa21c0

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains an embedded script payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The ML classifier strongly flags this PDF as malicious. While the document body and scripts are heavily obfuscated, the presence of an embedded script suggests an attempt to execute malicious code upon opening. The embedded URLs are related to XFA forms, which are sometimes used in exploit delivery.

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_obj0009.bin` `97927ceb96e58b72f246bedc8dd2a4e3c01e7f2bf6db952a172ce4cca444f874`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0xD5	12533 bytes

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