Malicious PDF — malware analysis report

Static analysis result for SHA-256 835af52ac422bca1…

MALICIOUS

PDF

21.3 KB Created: 2019-05-02 18:08:20 +01:00 Authoring application: mPDF 5.7
MD5: abeda6736e45a2f735d15fdbbe37c7ec SHA-1: bc5acf5ab4f9b8110e5d8cd042804872abc8cca3 SHA-256: 835af52ac422bca19ce6b9b7a17001bd7453dc4e175efd378c3cd61aced2f330
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits a critical heuristic firing for a link farm, containing numerous embedded URLs. The ML classifier also flagged the document as malicious with high confidence. The primary attack pattern involves leveraging these links, likely to redirect users to malicious websites or to manipulate search engine results. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://kiteeearpdf.myhome.cx/1f211f216f216f216f216f218/Der-Yalu-Fliesst-Eine-Jugend-In-Korea-by-Mi-r-k-Yi.pdf
    • http://kiteeearpdf.myhome.cx/1f211f211f213f219f211f212/Odem---On-The-Run-Eine-Jugend-in-der-Graffiti-Szene-by-J-rgen-Deppe.pdf
    • http://kiteeearpdf.myhome.cx/1f211f218f215f217f214f212/Die-verschwundene-Milchstra-e-Erinnerung-an-eine-saarl-ndische-Kindheit-und-Jugend-by-Wolfgang-B-ckel.pdf
    • http://kiteeearpdf.myhome.cx/1f211f211f215f211f211f214/Die-Uberflussige-Jugend-Der-Arbeitsgesellschaft-Eine-Herausforderung-an-Die-Padagogik-by-Franz-Josef-Krafeld.pdf
    • http://kiteeearpdf.myhome.cx/9f216f211f211f216f211/Erst-Die-Fehde-Dann-Der-Krieg-Jugend-Unterm-Hakenkreuz-Freiburgs-Hitler-Jugend-Begleitbuch-Zum-Film-quot-Es-Zittern-Die-Morschen-Knochen-quot-Von-Sudwest-by-Bernd-Hainmuller.pdf
    • http://kiteeearpdf.myhome.cx/1f211f216f216f216f216f211/Wo-Wasser-fliesst-und-Bronze-schimmert-Brunnen-und-Denkmale-in-Aachen-Rundwege-by-Anke-Sch-tt.pdf
    • http://kiteeearpdf.myhome.cx/8f217f216f218f210f212/Yankee-of-the-Yalu-by-Lee-McGiffin.pdf
    • http://kiteeearpdf.myhome.cx/8f217f216f218f210f211/Limbo-on-the-Yalu-and-Beyond-by-Robert-J-Berens.pdf
    • http://kiteeearpdf.myhome.cx/8f217f216f217f219f215/The-Yalu-Flows-A-Korean-Childhood-by-Mirok-Li.pdf
    • http://kiteeearpdf.myhome.cx/8f217f216f218f214f213/South-to-the-Naktong-North-to-the-Yalu-June-November-1950-by-Roy-E-Appleman.pdf
    • http://kiteeearpdf.myhome.cx/8f217f216f218f214f215/Contemporary-Arab-Fiction-Innovation-from-Rama-to-Yalu-by-Caiani-Fabio.pdf
    • http://kiteeearpdf.myhome.cx/9f217f219f218f216f214/Jugend-Ein-Liebesdrama-in-Drei-Aufzugen-by-Max-Halbe.pdf
    • http://kiteeearpdf.myhome.cx/8f218f219f210f217f211/Jugend-Am-Rande-Der-Gesellschaft-by-Michael-Hespos.pdf
    • http://kiteeearpdf.myhome.cx/8f217f216f218f216f217/Red-Devils-Over-the-Yalu-A-Chronicle-of-Soviet-Aerial-Operations-in-the-Korean-War-1950-53-by-Igor-Seidov.pdf
    • http://kiteeearpdf.myhome.cx/1f210f219f210f210f219f212/Religi-se-Entwicklung-in-Kindheit-Und-Jugend-by-Kalevi-Tamminen.pdf
    • http://kiteeearpdf.myhome.cx/1f211f210f219f219f214f216/Schwer-gezeichnet-Jugend-hinter-Gittern-by-Ronny-Ritze.pdf
    • http://kiteeearpdf.myhome.cx/1f211f215f210f211f219f212/Sex---Jung-und-Unanst-ndig-Unerh-rte-Jugend-Porno-pur-by-Ilka-Sommer.pdf
    • http://kiteeearpdf.myhome.cx/1f210f218f218f211f211f212/Odins-Welt-Germanische-G-ttersagen-f-r-die-Jugend-by-Karl-Friedrich-von-Chasot.pdf
    • http://kiteeearpdf.myhome.cx/9f212f210f217f216f211/O-Jugend-o-West-Berlin-Reportagen-Essays-Kolumnen-by-Philip-Meinhold.pdf
    • http://kiteeearpdf.myhome.cx/9f214f216f214f210f216/Aufgewachsen-in-Zwei-Reichen-Kindheit-Und-Jugend-1926-Bis-1945-by-Franz-Poeggeler.pdf
    • http://kiteeearpdf.myhome.cx/9f216f211f211f216f211/Erst-Die-F