Mail::SpamAssassin::Plugin::PDFInfo - PDFInfo Plugin for SpamAssassin
loadplugin Mail::SpamAssassin::Plugin::PDFInfoThis plugin helps detected spam using attached PDF files
Original info kept for history. For later changes see SVN repo
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PDFInfo Plugin for SpamAssassin
Version: 0.8
Info: $Id: PDFInfo.pm 904 2007-08-12 01:36:23Z root $
Created: 2007-08-10
Modified: 2007-08-10
By: Dallas Engelken
Changes:
0.8 - added .fdf detection (thanks John Lundin) [axb]
0.7 - fixed empty body/pdf count buglet(thanks Jeremy) [axb]
0.6 - added support for tags - PDFCOUNT, PDFVERSION, PDFPRODUCER, etc.
- fixed issue on perl 5.6.1 where pdf_match_details() failed to call
_find_pdf_mime_parts(), resulting in no detection of pdf mime parts.
- quoted-printable support - requires MIME::QuotedPrint (which should be in everyones
install as a part of the MIME-Base64 package which is a SA req)
- added simple pdf_is_empty_body() function with counts the body bytes minus the
subject line. can add optional <bytes> param if you need to allow for a few bytes.
0.5 - fix warns for undef $pdf_tags
- remove { } and \ before running eval in pdf_match_details to avoid eval error
0.4 - added pdf_is_encrypted() function
- added option to look for image HxW on same line
0.3 - added 2nd fuzzy md5 which uses pdf tag layout as data
- renamed pdf_image_named() to pdf_named()
- PDF images are encapsulated and have no names. We are matching the PDF file name.
- renamed pdf_image_name_regex() to pdf_name_regex()
- PDF images are encapsulated and have no names. We are matching the PDF file name.
- changed pdf_image_count() a bit and added pdf_count().
- pdf_count() checks how many pdf attachments there are on the mail
- pdf_image_count() checks how many images are found within all pdfs in the mail.
- removed the restriction of the pdf containing an image in order to md5 it.
- added pdf_match_details() function to check the following 'details'
- author: Author of PDF if specified
- producer: Software used to produce PDF
- creator: Software used to produce PDF, usually similar to producer
- title: Title of PDF
- created: Creation Date
- modified: Last Modified
0.2 - support PDF octet-stream
0.1 - just ported over the imageinfo code, and renamed to pdfinfo.
- removed all support for png, gif, and jpg from the code.
- prepended pdf_ to all function names to avoid conflicts with ImageInfo in SA 3.2.
Usage:
pdf_count()
body RULENAME eval:pdf_count(<min>,[max])
min: required, message contains at least x pdf mime parts
max: optional, if specified, must not contain more than x pdf mime parts
pdf_image_count()
body RULENAME eval:pdf_image_count(<min>,[max])
min: required, message contains at least x images in pdf attachments.
max: optional, if specified, must not contain more than x pdf images
pdf_pixel_coverage()
body RULENAME eval:pdf_pixel_coverage(<min>,[max])
min: required, message contains at least this much pixel area
max: optional, if specified, message must not contain more than this much pixel area
pdf_named()
body RULENAME eval:pdf_named(<string>)
string: exact file name match, if you need partial match, see pdf_name_regex()
pdf_name_regex()
body RULENAME eval:pdf_name_regex(<regex>)
regex: regular expression, see examples in ruleset
pdf_match_md5()
body RULENAME eval:pdf_match_md5(<string>)
string: 32-byte md5 hex
pdf_match_fuzzy_md5()
body RULENAME eval:pdf_match_md5(<string>)
string: 32-byte md5 hex - see ruleset for obtaining the fuzzy md5
pdf_match_details()
body RULENAME eval:pdf_match_details(<detail>,<regex>);
detail: author, creator, created, modified, producer, title
regex: regular expression, see examples in ruleset
pdf_is_encrypted()
body RULENAME eval:pdf_is_encrypted()
pdf_is_empty_body()
body RULENAME eval:pdf_is_empty_body(<bytes>)
bytes: maximum byte count to allow and still consider it empty
pdf_image_to_text_ratio()
body RULENAME eval:pdf_image_to_text_ratio(<min>,<max>)
Ratio calculated as body_length / total_image_area
min: minimum ratio
max: maximum ratio
pdf_image_size_exact()
body RULENAME eval:pdf_image_size_exact(<h>,<w>)
h: image height is exactly h
w: image width is exactly w
pdf_image_size_range()
body RULENAME eval:pdf_image_size_range(<minh>,<minw>,[<maxh>],[<maxw>])
minh: image height is atleast minh
minw: image width is atleast minw
maxh: (optional) image height is no more than maxh
maxw: (optional) image width is no more than maxw
NOTE: See the ruleset for more examples that are not documented here.