Do you desperately want to automate opening an Excel file and a Word file? I am afraid, there is no tool out of box. You need to invent your solution.
How to? let me describe what I have ever done…
You would need PowerShell installed in your Windows PC. You need to write a *.ps1 script to open files with appropriate application:
In Katalon Studio, you can write a Groovy script (a Test Case) that executes PowerShell as a Windows command while specifying the *.ps1 file you wrote. See
Using these 2 techniques combined, you should be able to achieve what you want : “open and show any of local Excel, PDF, Word files in Katalon Studio”.
This could be challenging.