PDF malware analysis — malicious · 53f8c0b1f2aa7e6f

MALICIOUS

PDF

123.1 KB

MD5: cb9d969bb1b44eef827993901d6b6e44 SHA-1: e0ef3c41dcde5c023aef4b3f27a96f554009993c SHA-256: 53f8c0b1f2aa7e6fedd2450e8d8db717d47c013ff0c5cd5e23bb5f1fabb12eed

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-78' and a high ML classifier score. An embedded script payload was detected, indicating the PDF is likely designed to exploit vulnerabilities and download a second-stage payload. The presence of an embedded URL further supports this assessment.

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` `5110e63e766cac76369534f823bccdb2b3432510d9b1a7f64f7c66b4553eb43a`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	125355 bytes

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