PDF malware analysis — malicious · f654bd0f10df13f3

MALICIOUS

PDF

14.7 KB

MD5: 669fc1a25e9736905ec054a7ce2dae6e SHA-1: 8d46fb276d0ca6ecd4e4d9132ce5aa2b0bdbf870 SHA-256: f654bd0f10df13f311ccfe3a5d706efdb34eb7fa424b0f46801dc49590222047

148 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious PDF T1566.001 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file utilizes XFA forms and contains an embedded script payload, strongly indicating malicious intent. ClamAV detections like Pdf.Exploit.Dropped-78 and Pdf.Exploit.Agent-36809 confirm its malicious nature. The embedded script is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based malware delivery. The presence of an embedded URL further supports this. The confidence is high due to multiple critical heuristic firings and specific ClamAV detections.

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.
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` `5ec8d646fa053f6479486be0234c2be4f1b7d5d509e6dd3f3dfe61ec4c244e9e`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14317 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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