Here are the steps on how to reproduce this bug:

1. Create a new Excel workbook
2. Create a hyperlink in cell B22
3. Add text to cell L3 (without hyperlinks)
4. Save file
5. Upload file attachment to Confluence and use the viewxls macro to display the file
6. You will be able to see a rendered version of the table makes L3 a hyperlink to the destination specified in cell B22

Not only that, there is also a strange pattern/behavior where you can see:
A12 --> link applied to K2
B12 --> link applied to L2
B32 --> link applied to L4
B42 --> link applied to L5
B52 --> link applied to L6
C22 --> link applied to M3
C32 --> link applied to M4
D22 --> link applied to N3
E22 --> link applied to 03
F22 --> link applied to P3
G22 --> link applied to Q3

Please refer to my Excel attachment in this ticket (Book1.xls) to understand the scenario better.