You could take a look at
PDF Utilities (poppler-utils via Synaptic or apt-get) which includes pdftotext:
Poppler is a PDF rendering library based on Xpdf PDF viewer.
This package contains command line utilities (based on Poppler) for getting
information of PDF documents, convert them to other formats, or manipulate
* pdfdetach -- lists or extracts embedded files (attachments)
* pdffonts -- font analyzer
* pdfimages -- image extractor
* pdfinfo -- document information
* pdfseparate -- page extraction tool
* pdftocairo -- PDF to PNG/JPEG/PDF/PS/EPS/SVG converter using Cairo
* pdftohtml -- PDF to HTML converter
* pdftoppm -- PDF to PPM/PNG/JPEG image converter
* pdftops -- PDF to PostScript (PS) converter
* pdftotext -- text extraction
* pdfunite -- document merging tool
Of course, success will depend on how the pdf file was generated. If you get what you want as a text file, you could then save that as an .odt file.
Edit: I forgot to provide the source for the quote. It's from the description tab in Synaptic for
PDF Utilities (based on Poppler).