PDF malware analysis — malicious · c1c885c963d67a57

MALICIOUS

PDF

19.2 KB

MD5: b66e0dbea847cb960b48bc97301610b3 SHA-1: cd41e282560254f8df2a84d86f24005f811cd8f2 SHA-256: c1c885c963d67a57625d4d6173ae6a4e6c50e96c62777eb992843906fce45d32

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 malicious intent. The PDF contains an embedded script payload, suggesting it's designed to exploit vulnerabilities and download a secondary payload. The embedded file artifact further supports this, indicating a dropper 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` `bd8003491560785ee6f07fd3d00b1df43e2c1bd1e5b9c483beb0f0f529bc4289`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC8	18906 bytes

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