PDF malware analysis — malicious · b511eb9b40ead3a6

MALICIOUS

PDF

93.5 KB

MD5: 0286520da1a3cfcf899606a73bcf0b5d SHA-1: 47b3c8dcf2be7a95f54f85a1be877ab0f89a96b2 SHA-256: b511eb9b40ead3a6207702246f8c605517fc7c8138ab3b882cbac4fe486b6194

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

The PDF file utilizes XFA forms, a known vector for embedding malicious content. Heuristics indicate an embedded script payload and ML classifiers strongly flag it as malicious. ClamAV detections further confirm its malicious nature, identifying it as Pdf.Exploit.Agent. The embedded script likely serves to download and execute a second-stage payload, although its exact function is obscured by the PDF structure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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 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://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00000246.bin` `e9f1d5bd11d99ea3165da81a0236d397d623b2f71638261f97346315259973ab`	pdf-embedded-script	PDF raw stream script payload at offset 0x246	95028 bytes
Detection ClamAV: Pdf.Exploit.Agent-36769 Obfuscation or payload: unlikely

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