Hi @Ush_Dhar
You can use from UiPath.PDF.Activities Package activity called ExportPDFPageAsImage
Loop through all the pages in the pdf for images.
You can use the Get File Info Activity and check the Size of the image in loop.
Ref- How do i get exact image size? - #4 by rikulsilva
If above 240 kb you can resize the image by using following way
Ref- Resize images - #10 by ppr
Hope this helps