Broken Image Becaused By Hidden Hex Binary

Get an attachment image :

When , i see in exiftool. not detecting any image. directly put into hexdump :

hexdump cat.png | head
0000000 0010 0110 0101 0000 0001 1011 0001 1101
0000010 0000 0111 0000 1010 0100 1010 0000 1010
0000020 0000 0000 0000 0000 0000 0000 0000 0111
0000030 0001 0110 0001 0010 0001 0001 0101 1000
0000040 0000 0000 0000 0000 0000 0100 1110 1001
0000050 0000 0000 0000 0000 0000 0100 1101 0110
0000060 0000 0010 0000 1001 0000 0000 0000 0000
0000070 0000 0000 1111 1100 1110 1101 0000 1111
0000080 0100 0100 0000 0000 0000 0100 0000 0000
0000090 0000 0000 0001 0110 0001 0001 0001 0100
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The hex of an image is binary, parse the hex and put in cyberchef:

We can see header PNG showed. extract it.

Showed image

look normal image in hex and exiftool and binwalk.

Put into aperisolve.com:

Get the flag.
COMPFEST15{n0t_X4ctly_s0m3th1n9_4_b1t_1nn1t_f08486274d}