1. Open on site ***""*** page ***"/about.html"***
2. Open view-source the site. In the code we'll see string with base64


Decoder we get a link to the site
echo "aHR0cHM6Ly9tZWdhLm56L2ZpbGUvUTVaR1dMNWEjcW04Y20tV2ZVVVZMbGUyaTA2ZVJITkc0eFRwNjlRY0tJV0JaUmtGSFktVQ==" | base64 --decode
3. On the site need to download a picture
4. We parse the picture using the "binwalk tool"
binwalk --dd='.*' imitation-game.jpg

0 0x0 JPEG image data, JFIF standard 1.02
6423339 0x62032B Zip archive data, at least v2.0 to extract, uncompressed size: 212356, name: Movies, Myth, and the National Security State.pdf
6619519 0x65017F End of Zip archive, footer length: 22

And we see several files including the archive.
In the archive have pdf file extract it.

5. We parse the pdf file using any site for example https://pdfcandy.com/result/889835650fb76e30.html
In the archive we found pictures


6. From these pictures we collect a phrase using the site
The pfrase is "14mp455w0rd"

7. Looking at the first picture that was at the very beginning and look for hidden files using the "steghide tool" and a passphrase "14mp455w0rd" and found txt file with the flag
steghide extract -sf imitation-game.jpg
Enter passphrase:
wrote extracted data to "flag.txt".
cat flag.txt