This from Microsoft:
Microsoft Office Excel provides many file format converters for importing
and exporting data. However, Excel does not provide a file format converter
for Adobe Portable Document Format (PDF), which is used with Adobe Acrobat
products. As an alternative, consider using the following Microsoft Office
Marketplace services:
Metadata Assistant, available from the Payne Consulting Group, converts an
Excel worksheet to a PDF file. For more information, see Metadata Assistant.
Able2Extract, available from Investintech, converts tabular information in a
PDF file to Excel worksheets. For more information, see Able2Extract.