Unpacking an elf binary packed by an unknown custom packer

Greeting;
so I am attempting to unpack this elf binary ;

$file

ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, stripped;

$upx -d wont work ; any ressources should I take a look at them ?

ps: I am down to share the binary with whoever is interrested

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I can’t promise I’ll have time, but I’d be down to take a look at it. Where did it come from?

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ill send you the link ;it is from a ctf challenge ; srry for the late response :pray:

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