Update PDF.yar

Malicious_Documents/PDF.yar

@@ -169,22 +169,6 @@ rule shellcode_blob_metadata : PDF
                 $magic at 0 and 1 of ($reg*)
 }
 
-rule multiple_filtering : PDF 
-{
-        meta: 
-                author = "Glenn Edwards (@hiddenillusion)"
-                version = "0.2"
-                weight = 3
-                
-        strings:
-                $magic = { 25 50 44 46 }
-                $attrib = /\/Filter.*?(\/ASCIIHexDecode\W+|\/LZWDecode\W+|\/ASCII85Decode\W+|\/FlateDecode\W+|\/RunLengthDecode){2}/ 
-				// left out: /CCITTFaxDecode, JBIG2Decode, DCTDecode, JPXDecode, Crypt
-
-        condition: 
-                $magic at 0 and $attrib
-}
-
 rule suspicious_js : PDF
 {
 	meta: