PDF malware analysis — malicious · 73f910ff024c48f9

MALICIOUS

PDF

3.8 KB

MD5: 6c527b60a20f61e12de4319286816c19 SHA-1: 8ee0e18d111707e76e900534adf53ff1746399a0 SHA-256: 73f910ff024c48f9e297ba9774824c283ccd015642ce22d8ad2775a3fe2ba0d0

176 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded XFA form content and a high-confidence ML classifier flagged it as malicious. ClamAV also detected it as Pdf.Exploit.Agent-6136306-0. The embedded JavaScript appears to be obfuscated but is designed to execute, likely to download and run a secondary payload, which is a common exploit technique for PDF files.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 6

ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
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 file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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://ns.adobe.com/xdp/
- 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_00000264.bin` `ad4e30b6a36cadd8ac2f1aa71d5c2d5f06e2d833f1ea019aa27db5eff837e86a`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x264	3838 bytes
Detection ClamAV: Pdf.Exploit.Agent-6136306-0 Obfuscation or payload: unlikely

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