Convert PDF forms/invoices to Excel keeping the file format

I am looking to convert a PDF invoice to an Excel workbook, keeping the original format and in bulk form for our archiving purposes. I want to keep all the standard information (shipping address, account numbers Invoice numbers etc) as fields on the same Excel book without it affecting the fields below. Basically, making the Invoice form into a spreadsheet that is identicle and searchable using pivot tables. The caviat is that we want to be able to do this en mass anywhere from 100-1000 documents at a time. Any advice?