There are many commercial soft to extract resources (images and sounds etc) from flash SWF files.
There is also a free crossplatform console toolset for compile and decompile SWF: swftools.
In particular, this package includes tools swfextract и swfdump to extract resources from the SWF and decompilation SWF files with getting list of elements with dumps. The disadvantage of these tools is that the first one can't automatically extract all resources from a file and the second can't store hex-dumps to binary files.