PDF malware analysis — malicious · 281de29df0c915e3

MALICIOUS

PDF

123.1 KB

MD5: dd99d97d151a600cb20dd76ca4546ec9 SHA-1: 74eae4a02dcd7485a274934b37adfc18ccdb890f SHA-256: 281de29df0c915e31ac06fd5d3f154ca65a564ede0d50b8b166b360f32c96911

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as Pdf.Exploit.Dropped-78. It contains an embedded script payload within a PDF stream, indicating it's designed to execute malicious code upon opening. The presence of an XFA form further suggests a complex, potentially exploitable structure. The embedded URL is likely part of the exploit chain or payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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://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` `4c1d1517e8c7c9182fd9f34b0d5821f04f09120e823aeea410edf60c2943333a`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	125326 bytes

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