PDF Table extraction

You can open any PDF in word. One thing you need to check before anything else is, if the PDF contains richtext or scanned data (images).

You can only extract data if the PDF contains richtext using the mentioned approaches and not physical scanned/software scanned images as part of the pdf content. OCR or Deep Learning based methods are more proficient for that kind of data extraction.

If your 20 pages are richtext then take a look at this solution from @vvaidya to extract table/s How to read table in a Word document - Build - UiPath Community Forum