I brightened it up

Checked it.
Brightening: Nothing.
Using a paint bucket: Despite being a JPG, it contains no artifacts so a paint bucket reveals this is just solid color.
JPG metadata…
Filename - fnaf12freddyinspace.jpg Orientation - Top left XResolution - 72 YResolution - 72 ResolutionUnit - Inch Software - Adobe Photoshop 7.0 DateTime - 2015:11:01 18:46:43 ExifOffset - 156 ColorSpace - Uncalibrated/Unknown (-1) ExifImageWidth - 1100 ExifImageHeight - 596 Thumbnail: – Compression – 6 (JPG) XResolution – 72 YResolution – 72 ResolutionUnit – Inch JpegIFOffset – 294 JpegIFByteCount – 741
Nope, nothing hidden here.

HEX Editor analysis: Nada, nothing. Not even a hidden file by renaming. No text besides JPG metadata. No abnormal filesize either, but I’d have spotted something in hex editor anyway.

Thank fuck.