You can simply export ABBYY forms (*.mxfd) with a dedicated function in the ABBYY Finereader Pro program. You can probably find it somewhere in the file menu.
Convert ABBYY form to Adobe Portable document format.
We found one software available in the database for this conversion.
Microsoft Windows software - convert mxfd to pdf on Windows
Intelligent and easy-to-use OCR program
Convert from mxfd file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.