PDF malware analysis — suspicious · 7f4873226a3bc94a

SUSPICIOUS

PDF

39.7 KB

MD5: f486f9acea95ff0dc5b32b965950ecd0 SHA-1: a3f15a121d722ccbf4d2b6ae71e5dc1f96727baa SHA-256: 7f4873226a3bc94a133de7a262763ee933d159ede7473881671cbbee25e64262

56 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic and the presence of a script within the document's streams. The ML classifier strongly suggests maliciousness. The embedded script is heavily obfuscated but appears to be designed to download and execute a secondary payload, a common technique for initial compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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_00000374.bin` `32f7154f26c0bf31e1ccc13a7c69ffb314e87173b8d0593547aa8bd0733a5e14`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x374	40609 bytes

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