PDF malware analysis — malicious · 3924fd9366265e55

MALICIOUS

PDF

11.9 KB

MD5: d104f76f1c81e649395e82d857c4dac8 SHA-1: a431b457c6f52bb3a565076c2c8efe9044bdf898 SHA-256: 3924fd9366265e55aff61db213e023a749a9c4e7f9e274630ba691ba062fda7a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The presence of an embedded file and script payload suggests it's designed to drop and execute a secondary stage. The embedded URLs, while not directly malicious, are part of the PDF structure.

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 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` `7de5c782556b81406741b0bce2bd5a9a753f821fd9c9d5bec9d0db66599f8010`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC8	11458 bytes

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