# Cool Image

## Description

My friend told me he found a really cool image, but I couldn't open it. Can you help me access the image?

[cool.pdf](cool.pdf)

## Solution

Just change the extension from pdf to png to get the answer.


The flag is

```
hsctf{who_uses_extensions_anyways}
```

Original writeup (https://github.com/kuruwa2/ctf-writeups/tree/master/HSCTF%206/Cool%20Image).