Two days back, I have received an email with PDF file attachment. When I tried to open PDF file, it shows an error message which says: "format error: not a PDF or corrupted" I was surprised to see such error message and thought hope it was not a virus file as attached PDF. Immediately I have called to my friend who is expert in handling PDF file error matters. My friend suggested me it may not be virus file. It could be possible that PDF file got corrupted so he suggested me to open PDF file in foxit PDF reader which is an alternative of adobe reader then I install the foxit pdf reader, & try to open "corrupt" pdf files. When I tried to open it in foxit reader, again it shows same error message.