how to extract data from this kine of pdf?

[farshadvl]

Hi everyone I have a pdf file that outputted from another app.
I want to read data like text from highlighted section I used pdfsharp extract extension method do each way that was in the internet but I couldn't do that.
please see this pdf file format and help me to do that.
file.pdf

[farshadvl]

no body can't help me?

[ThomasHoevel]

Did you add the yellow highlighting to the PDF?
Did you analyze the PDF? What have you found?

[farshadvl]

yes I have highlighted.
I have test this pdf with many c# library and your library but they couldn't read it.
but simple text pdf can be read .