This info is specific to the iOS app, as that is where awards originally premiered. Other platforms may have different logic to awarding some of the awards.
So, Classic Attack. Back in the day, the iOS app came with five bundled books:
Pride And Prejudice By Jane Austen
Grimms' Fairy Tales By The Brothers Grimm
DThe Adventures Of Huckleberry Finn By Mark Twain
Alice's Adventures in Wonderland By Lewis Carroll
When you had read and finished (This was ≥ 90% through the book, and closed / marked as finished) these five books you would then be granted the Classic Attack award.
In a future version of the app the books were no longer bundled, meaning you could not achieve the award.
Getting technical for a moment, the logic behind the award was looking for the five books by a unique ID. This is why not just any old classic book will work.
We had copies of the bundled books put on our servers, and modified our code so that it looked for the unique id's as found on our server. It was therefore possible to get the award again.
Furthermore, according to my top secret document, this award was only available on iOS. You could SEE the award on other devices, as the Awards are synced, so if you had an iOS device you could achieve the award and then see it on another device, but you could not actually obtain the award on another device.
Below are the URL's for those five books needed to get the award. You will need to add them to your account (they are free books), then on an iOS device with the Kobo app installed, open each of the five books, and - my preferred method - go to the last page on the last chapter, and use the "Mark as Closed" button to close the book. Repeat this for all of the five books and you should get the Classic Attack award.
I just tried it on a brand new account I setup and so it does appear to be working.
URLS:
http://www.kobobooks.com/ebook/Pride...Zlg/page1.html
http://www.kobobooks.com/ebook/Grimm...WUQ/page1.html
http://www.kobobooks.com/ebook/Dracu...7Ug/page1.html
http://www.kobobooks.com/ebook/The-A...U-A/page1.html
http://www.kobobooks.com/ebook/Alice...Fbw/page1.html