PDF malware analysis — malicious · 0be4f19eaca096e0

MALICIOUS

PDF

14.7 KB

MD5: 229ab8da2129d06397e1dfe7c3cdde50 SHA-1: 980c07da6102d6caa44ca7d5292e5236b61276e2 SHA-256: 0be4f19eaca096e08977e28ea6932f5de5a509556d3521705059b6bdb3157991

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains an XFA form with embedded JavaScript, flagged by multiple heuristics and ClamAV as malicious. The embedded script is likely responsible for downloading and executing a second-stage payload, as indicated by the ClamAV detection names 'Pdf.Exploit.Dropped-78' and 'Pdf.Exploit.Agent-36809'. The presence of XFA and embedded scripts points to exploitation for client execution, likely delivered via spearphishing.

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
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00000329.bin` `ffe05d72d7d4ce3185b684e59d1746733914657f44ee45eb05e7606d9cac6a98`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14348 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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