Getting the id number from a pdf file and entering it on a desktop application

Hie Devs i im having a chalenge below:

Problem Statement:
I have a folder which have many pdf files of the same format.So the pdf files have many details about a member e.g Member ID,Member Name,Member Surname etc.I want to open one pdf of a member at a time extract the member id and enter the information on a destop application in my case onto Health Information Platform. and then open the second pdf of another member extract the id number and place the information on a destop application in my case onto Health Information Platform(HIP) then do the same for all other pdfs of other members.
I have tried using the Get full text activity to get the id number and delcared the variable as a string variable for id number with no success


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Any help will be greatly appreciated

Regards

Duplicate.