I wonder what the purpose is for some people or people who create bots to spam comment forms with a one liner like: “Hi, I found your site in search engine and your site is informative.”
You can readily say the comment is a spam because there is nothing in the site except a “contact us” form.
And you can say too that these are spams because the SEO-improving URL of the commenter is not present at all.
Once or twice a week, I simply delete this type of comments. Not worth keeping them.