PDF malware analysis — malicious · 9d28b4b2da255981

MALICIOUS

PDF

18.3 KB

MD5: d4c6f4a35ef6fe28ff07153c542e9d75 SHA-1: f13e893a7e5593967fcaa8fb2e2d05802f1f4614 SHA-256: 9d28b4b2da2559818990be323454703c3f04b4fa14a019130522e8b4883de580

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains an embedded script payload and utilizes XFA forms, both flagged as malicious by heuristics and ML classifiers. ClamAV detections further confirm its malicious nature. The embedded script is likely responsible for downloading and executing a second-stage payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The presence of an embedded URL suggests a delivery mechanism for this payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36789 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36789
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.
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_00000325.bin` `817c61f9c7923d5d2d9a43e7bf2dd86b6e415c29b3f3f4d41bfc02599e52883e`	pdf-embedded-script	PDF raw stream script payload at offset 0x325	18008 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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