Scraper
A web crawler that takes content from web site to generate new web pages composed entirely of other peoples text. Essentially it is plagiarism for the purpose of generating advertising revenue. This can be a real problem for the orginal author of the material if a search engine accidently applies a duplicate page penality to the orginal webpage and treat the generated pages as the ‘canonical’ version.
Scrapers can be used for other purposes such as compiling lists of email address and phone number or looking for web application with known vulnerabilities.