Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a857b1001e0467…

MALICIOUS

PDF

18.0 KB Created: 2019-05-02 16:36:53 +01:00 Authoring application: mPDF 5.7
MD5: a9e73f1d25b16bdcd5dc333adeff9c2b SHA-1: f3f43d28edc49f746d04adddbb93a8013299e6ce SHA-256: c5a857b1001e0467138764d5abbd101757e4ef8e1839eee63f18976f9cec49df
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. While the ML classifier also flagged this as malicious, the specific intent appears to be SEO manipulation or directing users to potentially malicious content hosted on the 'cefasfese.4pu.com' domain. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9788

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://cefasfese.4pu.com/6739731731733739/Together-Forever-You-re-Invited-to-a-Creepover-8-by-P-J-Night.pdf
    • http://cefasfese.4pu.com/6739731731730739/Best-Friends-Forever-You-re-Invited-to-a-Creepover-6-by-P-J-Night.pdf
    • http://cefasfese.4pu.com/1731737734731738/You-Can-t-Come-in-Here-You-re-Invited-to-a-Creepover-2-by-P-J-Night.pdf
    • http://cefasfese.4pu.com/6739731731733736/There-s-Something-Out-There-You-re-Invited-to-a-Creepover-5-by-P-J-Night.pdf
    • http://cefasfese.4pu.com/6739731731730738/Ready-for-a-Scare-You-re-Invited-to-a-Creepover-3-by-P-J-Night.pdf
    • http://cefasfese.4pu.com/4735739734731735/A-Night-Of-Forever-Night-1-5-by-Lori-Brighton.pdf
    • http://cefasfese.4pu.com/4733731731733737/Forever-Night-by-Xondra-Day.pdf
    • http://cefasfese.4pu.com/2730732735738730/Forever-and-the-Night-Vampire-1-by-Linda-Lael-Miller.pdf
    • http://cefasfese.4pu.com/1732733736732732/Forever-Rowan-Night-Creatures-2-by-Violet-Summers.pdf
    • http://cefasfese.4pu.com/3739734738730731/The-Night-Is-Forever-Krewe-of-Hunters-11-by-Heather-Graham.pdf
    • http://cefasfese.4pu.com/4730730737739735/One-Night-Forever-Cinderella-Chronicles-1-by-Lisa-Renee-Jones.pdf
    • http://cefasfese.4pu.com/3730734730736734/The-Punch-One-Night-Two-Lives-and-the-Fight-That-Changed-Basketball-Forever-by-John-Feinstein.pdf
    • http://cefasfese.4pu.com/4730736736734730/The-Brothers-Wroth-Warlord-Wants-Forever-No-Rest-for-the-Wicked-Dark-Needs-at-Night-s-Edge-Untouchable-by-Kresley-Cole.pdf
    • http://cefasfese.4pu.com/2737738737733738/Cordially-Invited-Pushing-the-Envelope-5-by-Kim-Dare.pdf
    • http://cefasfese.4pu.com/5730731735734730/You-re-All-Invited-Vampire-Queen-8-6-by-Joey-W-Hill.pdf
    • http://cefasfese.4pu.com/3739736730731739/One-Wild-Night-Forever-Wild-1-by-Magan-Vernon.pdf
    • http://cefasfese.4pu.com/3732736730730738/Lucky-Penny-Smytheshire-Massachusetts-3-You-re-Invited-5-by-Elizabeth-August.pdf
    • http://cefasfese.4pu.com/3738731737732734/A-Faerie-Fated-Forever-Forever-1-by-Mary-Anne-Graham.pdf
    • http://cefasfese.4pu.com/1731730739731734/A-Faerie-Fated-Forever-Forever-1-by-Mary-Anne-Graham.pdf
    • http://cefasfese.4pu.com/4737738739731730/A-Banquet-of-Consequences-True-Life-Adventures-of-Sex-Not-Too-Much-Drugs-Plenty-Rock-amp-Roll-of-Course-and-the-Feds-Who-Invited-Them-by-Jake-Rohrer.pdf