PDF malware analysis — malicious · 73bd4acf74c8b971

MALICIOUS

PDF

11.7 KB

MD5: 5bc3c888fe9b9b160b538dc81d94a293 SHA-1: 8d9fcb52032450149c51cb1e5e8764acf5d9c736 SHA-256: 73bd4acf74c8b9718b7977225bd38dfbc3ef394796b82d1192ceae058b2e5025

116 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by ClamAV and an ML classifier, indicating exploitation. It contains an embedded script payload and an embedded file, suggesting it's designed to drop and execute a secondary malicious artifact. The benign URLs present do not detract from the malicious indicators.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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/
- 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` `9b555aeccb9cbc241bdda3b4f2d7f34f1b4c50800c67f2b26b75f186f580c370`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC8	11252 bytes

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