Clipping Mask
Select the photo layer and move it above the Rectangle layer…
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Hover between the photo and rectangle layers, holding ALT. When you see the arrow, left-click. It should then have the arrow on the left…
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… and your photo should be clipped by the rectangle shape.
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Transform Rectangle
Select the Rectangle layer….
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CTRL+T to transform … then right-click > Perspective.
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Push in the top square to the left until it’s at the antlers…
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Right-click on the rectangle again, this time choose Warp.
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Push in the top and sides and pull down the bottom like this…
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[Enter] or click on Done to apply the transformation.
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Sticking Out
Select the photo layer and duplicate it (CTRL+J).
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Go to the Properties tab on the top-right and click on Remove Background.
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This adds a layer mask with the background painted out for you.
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Select the rectangle layer again, and CTRL+T > Scale
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Push down the top a bit so we have a good amount of the antlers sticking out.
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Style
Select all the layers except the white Background layer (SHIFT-click).
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Then CTRL+G to group them…
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With the folder selected, add layer style… choose Drop Shadow
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Reset to default and increase the opacity to about 60, increase the size to about 30, and change the angle to top-left.
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You will see the style on the folder…
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You can adjust the size of the rectangle more if needed.