Rating:
It doesn't really look like gold to me...
Checking the image file
┌──(kali㉿kali)-[~]
└─$ file pallets-of-gold.png
pallets-of-gold.png: PNG image data, 3191 x 227, 8-bit colormap, non-interlaced
┌──(kali㉿kali)-[~]
└─$ exiftool pallets-of-gold.png
ExifTool Version Number : 12.16
File Name : pallets-of-gold.png
Directory : .
File Size : 683 KiB
File Modification Date/Time : 2021:06:16 21:50:39+00:00
File Access Date/Time : 2021:06:20 00:53:55+00:00
File Inode Change Date/Time : 2021:06:20 00:53:55+00:00
File Permissions : rw-r--r--
File Type : PNG
File Type Extension : png
MIME Type : image/png
Image Width : 3191
Image Height : 227
Bit Depth : 8
Color Type : Palette
Compression : Deflate/Inflate
Filter : Adaptive
Interlace : Noninterlaced
Palette : (Binary data 768 bytes, use -b option to extract)
Image Size : 3191x227
Megapixels : 0.724
Challenge name pallets is refering to colour palette (bitmap)
Let's use stegonline to check for colour palette https://stegonline.georgeom.net/upload
Let's browse colour palette
We can see our flag
flag{plte_chunks_remind_me_of_gifs}
