This is a pre-lab test to verify that the real lab instructions haven't been tampered with. The real lab instructions are here. Right click the link and download the file so you can run a command on it:
$ cat lab_encryption.html | openssl sha256
e310ccbbea5909723f472f496460339224b1edee3cda3fe6ab57100efb46430aIf the hash you receive matches the output above, then it's the original file. Go ahead and work on it.
If not, run away! Some hacker is trying to get you to do the wrong assignment!