PDF malware analysis — malicious · 031be3c46468f3c1

MALICIOUS

PDF

12.3 KB

MD5: 936ae400dd112b7988055e787a7f0ffd SHA-1: 839f503e8c0460c3591073f42e8317fc91a64311 SHA-256: 031be3c46468f3c14d3fa9815af9c48bd53f5d6031c4c52c8af5ff69a99b62d6

116 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a PDF with embedded script content and an embedded file, flagged by multiple heuristics and a machine learning classifier as malicious. ClamAV detection indicates it is a known exploit that drops a payload. The embedded script, though obfuscated, likely facilitates the execution of this dropped payload.

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` `f99f5f79a2d5bd1ff76d49e616b37d261dda6a011d13c402d41ff2332f248f22`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC8	11851 bytes

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