PDF malware analysis — malicious · b5c4b3496aa0ad41

MALICIOUS

PDF

19.2 KB

MD5: acb08fd4e4c5847554bd08c17feff9b3 SHA-1: d98e2e40ff0d103e90e833d5d29c0be17b84634c SHA-256: b5c4b3496aa0ad413725a959d537b1f1d28fdbd6d9f52aefbd8e0b54ab5e9e94

126 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The critical ClamAV detection and high ML classifier score strongly indicate maliciousness. The PDF contains embedded content and an embedded script payload, suggesting it's designed to exploit vulnerabilities upon opening. The embedded file artifact further supports the payload delivery mechanism.

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` `d0cdf931a386e4d5361409ce822875265318193ef74ee0d9acd14f366b454c1f`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC8	18930 bytes

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