PDF malware analysis — malicious · 03792d6cc3b4eb09

MALICIOUS

PDF

18.3 KB

MD5: a8cb8a6668d4ebd482461083304e8dc1 SHA-1: 5d266a9c3c4241eaf149c1988e351324380b1991 SHA-256: 03792d6cc3b4eb096cdd72a093151cc887a4004af6298e50aa4eea193b3174eb

168 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. The presence of an XFA form and an embedded script suggests an exploit designed to execute arbitrary code. The embedded script, although heavily obfuscated, is likely responsible for downloading and executing a secondary payload, as indicated by the ClamAV detection names.

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` `b5bed2a9a1eca8084fc9ffbbf8bdf7c5c8dc958b1c74bb5c2b6c78531f533b9d`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	17977 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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