UDM_DISPUTE attach PDF to case ID ABC

HI All,

I need to attach PDF file to a case ID ABC ( in T-code UDM_DISPUTE SAP FI ) .

Path:UDM_DISPUTE-->case ID-->Attridute(button)--->under related Objects select Various--->right click selct Create and add PDF file from Desktop.

Now the user wants to automate just by running a program from ABAP.

I have tried to debug the Std program to find FM,BAPI's to upload the Text but unable to find FM and BAPI's to upload PDF file by providing Case ID and PDF file path which can upload the PDF file into UDM_DISPUTE in order to reach my requirnment.

Any Suggestion will be rewarded.

Thanks

Gopal