PDF malware analysis — malicious · 5ba8dba8f73dfbbd

MALICIOUS

PDF

12.2 KB

MD5: 1e8c7d18e4921b44fe00296d224e9f9e SHA-1: 8ba93eb7d8bc8672e1e336c5373c951f6d9f0bcd SHA-256: 5ba8dba8f73dfbbdbc2bc088d351dc2ca07f15480869046ab68f132622474780

116 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a PDF with XFA form elements and an embedded script payload, flagged by ML classifiers and ClamAV as a malicious exploit. The embedded file object is likely the secondary payload. The presence of an embedded exploit and payload strongly suggests it was delivered as a spearphishing attachment.

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` `57d5d8b9e8890d58ed2a0960003f8c6e5bbc24fd4b9a52c3c716ab2adc0bb382`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	11692 bytes

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