Malicious PDF — malware analysis report

Static analysis result for SHA-256 04058dd704c8b70c…

MALICIOUS

PDF

24.8 KB Created: 2019-05-02 05:55:27 +01:00 Authoring application: mPDF 5.7
MD5: 03d88dc8058e90d2a31fc3757e5af6e6 SHA-1: 0706fc84bf86658593fcbfb2358bea8b0be3468a SHA-256: 04058dd704c8b70c11aedc0686eb08c072070f0fa582f7ad271a5ce3035c8d14
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. While the specific intent is unclear, the sheer volume of links suggests a non-standard, potentially malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

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/1730733731738733734/Student-Activities-Manual-for-Treffpunkt-Deutsch-Grundstufe-by-Margaret-T-Gonglewski.pdf
    • http://cefasfese.4pu.com/1730733731735737734/Treffpunkt-Deutsch-Grundstufe-by-Margaret-T-Gonglewski.pdf
    • http://cefasfese.4pu.com/1730733731736737733/Treffpunkt-Deutsch-by-Margaret-T-Gonglewski.pdf
    • http://cefasfese.4pu.com/1730733731736738737/Answer-Key-for-Treffpunkt-Deutsch-Grundstufe-by-E-Rosemarie-Widmaier.pdf
    • http://cefasfese.4pu.com/1730733731738734733/Treffpunkt-Deutsch-Grundstufe-amp-1key-BB-Pkg-by-Prentice-Hall-Pearson.pdf
    • http://cefasfese.4pu.com/8735736737739739/Student-Activities-Manual-for-Oukada-Bertrand-Solberg-s-Controverses-by-Larbi-Oukada.pdf
    • http://cefasfese.4pu.com/1730735734737739730/Student-Activities-Manual-for-Motyl-Mudretzkyj-Sp-inghaus-Anders-Gedacht-Text-and-Context-in-the-German-Speaking-World-3rd-by-Irene-Motyl-mudretzkyj.pdf
    • http://cefasfese.4pu.com/1730733731739731737/Treffpunkt-Deutsch-amp-Studt-Actv-amp-aud-amp-vid-Pkg-by-Prentice-Hall-Pearson.pdf
    • http://cefasfese.4pu.com/1730733731739734732/Treffpunkt-Deutsch-Gru-amp-actv-amp-dvd-amp-gramm-amp-dict-by-Prentice-Hall-Pearson.pdf
    • http://cefasfese.4pu.com/1731735731731730739/Laboratory-Manual-to-Accompany-Deutsch-Na-Klar-an-Introductory-German-Course-by-Lida-Daves-Schneider.pdf
    • http://cefasfese.4pu.com/8732730734737733/Elementary-Statistics-Using-the-T1-83-84-Plus-Calculator-Student-s-Solutions-Manual-by-Milton-F-Loyer.pdf
    • http://cefasfese.4pu.com/6733738738734735/Student-s-Solutions-Manual-to-Accompany-College-Algebra-by-Fred-Safier.pdf
    • http://cefasfese.4pu.com/8734731734734731/Student-s-Solution-Manual-Introduction-To-Statistics-Second-Edition-by-Richard-D-De-Veaux.pdf
    • http://cefasfese.4pu.com/9738731735733735/Student-Handbook-and-Solutions-Manual-for-Concepts-of-Genetics-by-William-S-Klug.pdf
    • http://cefasfese.4pu.com/8733737732734735/Complex-Variables-and-Applications-Student-s-Solutions-Manual-by-James-Ward-Brown.pdf
    • http://cefasfese.4pu.com/1731731737738730738/Student-Solutions-Manual-Advanced-Engineering-Mathematics-Volume-2-by-Erwin-Kreyszig.pdf
    • http://cefasfese.4pu.com/1731739731733737732/Student-Solutions-Manual-for-Nonlinear-Dynamics-and-Chaos-2nd-Edition-by-Mitchal-Dichter.pdf
    • http://cefasfese.4pu.com/9739736739736735/Bravo-Tapescript-Student-Activity-Tapescript-Answer-Key-for-Taped-Activities-Second-Edition-by-Gisele-Loriot-Raymer.pdf
    • http://cefasfese.4pu.com/6733738738734739/Student-s-Solutions-Manual-To-Accompany-Barnett-And-Ziegler-Precalculus-Functions-And-Graphs-2nd-Ed-by-Fred-Safier.pdf
    • http://cefasfese.4pu.com/7735733732735733/Student-s-Solution-Manual-An-Outline-for-the-Study-of-Calculus-TC7-Louis-Leithold-Vol-1-Chapters-1-4-by-Leon-Gerber.pdf