Hi Pravin,
Thank you for your interest in Syncfusion Products.
Our Barcode scanner rely on ZXing barcode decoder for detecting Barcode. On our analysis, ZXing could not detect the Barcode in the specific PDF, we have also tried with sharpening the input but still the Barcode is not detectable. As this issue occurs with the ZXing, we could not proceed further to fix this issue.
Please let us know if you have any concerns.
With Regards,
Gayathri R