Web scraping for automated email extraction

We need a software application to be developed to extract email addresses by running search queries in a specific website. The process steps are given below: 1. Import an Excel file, which has a list of unique IDs 2. Pick IDs from the Excel file one after the other 3. Run a search in a website specified by us using the ID at specific query/seconds 4. A single result will be displayed, which will have a "Document button" 5. Click on the "Document button", which will open-up a page 6. Several PDF documents, with unique titles, will be present on this page; download a PDF document that has a specific title (as specified by us) 7. The downloaded PDF is a scanned document in which text cannot be selected 8. Run OCR plugin (to be selected) on the downloaded PDF and extract all email addresses in this document 9. Save the email addresses against the ID that was used to run the search, in an Excel sheet 10. Carry out all the above steps till all the IDs in the Excel sheet have been used 11. Make the Excel sheet available for download once the task has been completed, and send an email to a specific email ID informing that the job is completed. Things to be noted: 1. The website where the search has to be carried out will throw up captcha once in a while, and also block multiple queries from a single IP. Hence, this has to be worked around, for example, by using "instances" to workaround, or by using other methods 2. The application has to be hosted on a Windows VPS server 3. MS office is already installed on the VPS 4. Cron Job has to be run to delete the downloaded PDF documents upon extracting data 5. Source code has to be provided to InvnTree 6. InvnTree holds all Intellectual Property associated to the application 7. The application cannot be offered to any third party by the developer