PDF malware analysis — malicious · 16612f1d24e50cef

MALICIOUS

PDF

11.8 KB

MD5: 9fc426bcad93fbe0e01f2b20103bed3b SHA-1: 71381acd9117e932281e118347a5b944a805d13a SHA-256: 16612f1d24e50cefe87b38b706dbfd4c9dfc708be07956523d898911a3d818e6

116 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. It contains embedded content and XFA forms, which are common vectors for PDF exploits. The embedded file and the ClamAV detection name suggest it's designed to drop a secondary 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` `7f33eae988bd85823cc9372194a300018802fdab33e476a2c67cc39ac43adeff`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC8	11323 bytes

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