PDF malware analysis — malicious · 9b57cf4a78c8fe26

MALICIOUS

PDF

93.2 KB

MD5: 2c615c3be26fb727617d84e329d8fbcf SHA-1: 0e5d0807f28edc375fe287a8633efa3ce74c6902 SHA-256: 9b57cf4a78c8fe26b0584de8f39e597e331bb15418f59b4f022b663e197d70af

180 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059 Command and Scripting Interpreter

The PDF 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 is likely responsible for delivering the secondary payload, though its exact function is obscured by obfuscation.

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` `e4c5e21b43b7ec715030875dda64d79823365e2d88ed036ccd0f5b2acd2593ca`	pdf-embedded-script	PDF raw stream script payload at offset 0x246	94714 bytes
Detection ClamAV: Pdf.Exploit.Agent-36769 Obfuscation or payload: unlikely

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