March
5th,
2019
This is a simple web site with two pages, index.html and about.html
After some test I found that there is 300 pdf. On the index.html page we can see a link, which redirects to Link
We will try to change the number 1 of the pdf in the url by the number to see if we have access to other pdf of the site
I used wget to download them all.
Once we download all the pdf, we can see that one is different (number 255), it’s red instead of blue.
We just have to open it to get the flag.
Flag :
flag{F1rst_Gr4d3rs_4r1thm3t1c_1s_d4ng3r0us}