008 is the user-agent used by 80legs, a web crawling service provider. 80legs allows its users to design and run custom web crawls. So, if 008 is crawling your website, it means that one or more 80legs users created a web crawl that went (eventually) to your website.
People use 80legs for a variety of reasons, including providing data to their own search engines, monitoring trends in online opinions, and other interesting applications.