Regular Expression to read pdf


I need to extract the information from pdf having data about school and with invoice details.
Suggest me any sample to do it with regular expression.


We need to know the following:

1.) What text is scraped from the pdf (you can use dummy data if need be, but make sure the format is the same).
2.) What values you are trying to get.


Can your share sample strings, so that we can suggest you regex for that