We need to define an encryption algorithm. And how was it made anyway?

Question

Encryption

There is encrypted data.
(Data is not inserted here, probably too many characters)
vk.com/doc358872322_437423990?hash=986c67c488456ed...
After decryption, the data looks like this:
Qiwi egg #1;
Qiwi egg #2;
Qiwi egg #3;
Qiwi egg #4;
Qiwi egg #5.
HelloKitty BenderBay.com
R7XCU2GS7WPNR2LDFTDL2KYUK You
need to understand the encryption algorithm to create such a "key". Who knows how it was done?

Answer 1

Some kind of exotic: repeating blocks with a period of 14 bytes, the ratio of "encrypted" and "decrypted" data in the region of 1/140, low entropy of "encrypted" data.