Malicious PDF — malware analysis report

Static analysis result for SHA-256 71dc9709cdfe6cfa…

MALICIOUS

PDF

21.6 KB Created: 2020-01-02 06:02:52 +00:00 Authoring application: mPDF 5.7
MD5: ca7d1df53d13a0f966cc5f1adebd3d5c SHA-1: 9f5d33ae3d87cebf5d839e1de98cd9da7eb0c64e SHA-256: 71dc9709cdfe6cfaba58f20661e0a2358e4ec80f94dd61b3d83df2c62e4ebff3
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, identified as a link farm. While the URLs themselves are marked as benign, the sheer volume and the heuristic firing of 'PDF_SEO_LINK_FARM' suggest a malicious intent, possibly for SEO manipulation or to distribute further payloads. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure implies an attempt to redirect users to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/1731733733738736736/Die-W-nsche-meiner-Schwestern-by-Lisa-Van-Allen.pdf
    • http://cefasfese.4pu.com/1730737731739733734/Sinnliche-Schwestern-by-VG-Dade.pdf
    • http://cefasfese.4pu.com/1730731732730736736/Das-Tao-der-weisen-Frauen-Der-geheime-weibliche-Weg-des-Tao-by-Unsterbliche-Schwestern.pdf
    • http://cefasfese.4pu.com/1730730734733739732/Ziemlich-beste-Schwestern---So-ein-Affentheater-by-Sarah-Welk.pdf
    • http://cefasfese.4pu.com/1731731730731739733/Lutsch-Schwestern-wollen-es-schlucken-by-Hugo-Hopp.pdf
    • http://cefasfese.4pu.com/1730730734734739736/Ziemlich-beste-Schwestern---Mit-Karacho-in-den-Winter-by-Sarah-Welk.pdf
    • http://cefasfese.4pu.com/9730732732736738/Die-Stunde-der-Schwestern-amp-Das-Haus-unter-den-Zypressen-Zwei-Romane-in-einem-Band-by-Katja-Maybach.pdf
    • http://cefasfese.4pu.com/9731737736733736/Nicht-ohne-meine-Schwestern-gefangen-und-missbraucht-in-einer-Sekte---unsere-wahre-Geschichte-by-Celeste-Jones.pdf
    • http://cefasfese.4pu.com/1730738731731738732/Noras-Schwestern-Weibliche-Hauptpersonen-in-Romanen-Maennlicher-Autoren-Des-Modernen-Durchbruchs-Eine-Untersuchung-Des-Entwicklungsaspekts-by-Annegret-Heitmann.pdf
    • http://cefasfese.4pu.com/8738736730736735/Die-Schuhe-meiner-Schwester-by-Babsy-Tom.pdf
    • http://cefasfese.4pu.com/3739736736736/Rundherum-in-meiner-Stadt-by-Ali-Mitgutsch.pdf
    • http://cefasfese.4pu.com/8736732731733738/Mit-dir-an-meiner-Seite-by-Nicholas-Sparks.pdf
    • http://cefasfese.4pu.com/1731734730737732734/Gesammelte-historische-Romane-Christoph-Columbus-Alexander-in-Babylon-Das-Gold-von-Caxamalca-Von-Helden-und-ihrem-Widerspiel-Caspar-Hauser-und-Die-Schwestern-und-mehr-by-Jakob-Wassermann.pdf
    • http://cefasfese.4pu.com/6732734730734736/Creating-Wealth-Retire-in-Ten-Years-Using-Allen-s-Seven-Principles-of-Wealth-by-Robert-G-Allen.pdf
    • http://cefasfese.4pu.com/9735732731739736/B-ren-in-meiner-K-che-by-Margaret-Merrill.pdf
    • http://cefasfese.4pu.com/1732737736732/R-ckkehr-an-den-Ort-meiner-Tr-ume-by-Emilie-Richards.pdf
    • http://cefasfese.4pu.com/1731735734730733733/Der-Arzt-meiner-Tochter-by-Alina-Jipp.pdf
    • http://cefasfese.4pu.com/1731737738733734731/Ich-bin-Zeugin-des-Ehrenmords-an-meiner-Schwester-by-Nourig-Apfeld.pdf
    • http://cefasfese.4pu.com/1731736738732739733/Die-letzten-Stunden-meiner-Brille-by-Nino-Vetri.pdf
    • http://cefasfese.4pu.com/9730734739732735/Muscheln-in-meiner-Hand-by-Anne-Morrow-Lindbergh.pdf