Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88e7c6fe4d68c91…

MALICIOUS

PDF

29.2 KB Created: 2019-05-05 05:02:49 +01:00 Authoring application: mPDF 5.7
MD5: 21cc93333dd548755ea9cc4bae97e4a3 SHA-1: 8649a11267a5f0e118fdd93493bc89d12489c95d SHA-256: c88e7c6fe4d68c91566ed464e46151480809f1c2b6119817de15d29c1e56c6f3
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of embedded URLs, flagged as a 'PDF_SEO_LINK_FARM'. While the document body itself is heavily obfuscated and does not provide clear textual lures, the sheer volume of external links suggests a malicious intent, possibly for SEO manipulation or to redirect users to malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

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/1730737738738739739/Jurodstvo-Eine-Studie-Zur-Phaenomenologie-Und-Typologie-Des-Narren-in-Christo-Jurodivyj-in-Der-Postmodernen-Russischen-Kunst--Venedikt-Erofeev-Die-Reise-Nach-Petuski-Aktionismus-Aleksandr-Breners-Und-Oleg-Kuliks-by-Natalia-Ottovordemgentschenfelde.pdf
    • http://cefasfese.4pu.com/8736732738738738/Gullivers-Reisen-Reise-nach-Lilliput-Reise-nach-Brobdingnag-Reise-nach-Laputa-Reise-in-das-Land-der-Hauyhnhnms---Vollst-ndige-deutsche-Ausgabe-von-Jonathan-Swift-by-Jonathan-Swift.pdf
    • http://cefasfese.4pu.com/4736739734738736/Moscow-Circles-by-Venedikt-Erofeev.pdf
    • http://cefasfese.4pu.com/1731735734731733738/Schatzi-eine-Reise-und-ich-Mit-dem-Wohnmobil-nach-Istanbul-by-Hieronymus-L-.pdf
    • http://cefasfese.4pu.com/9733739735739735/Eine-Studie-in-Sherlock-Eine-Studie-in-Scharlachrot-amp-Das-Zeichen-der-Vier-Zwei-Sherlock-Holmes-Romane-by-Arthur-Conan-Doyle.pdf
    • http://cefasfese.4pu.com/1730737738738739738/Unreliable-narration-in-der-russischen-Literatur-F-M-Dostoevskijs-Zapiski-iz-podpol-ja-und-V-V-Erofeevs-Moskva-Petu-ki-im-Vergleich-by-Sophia-Manns.pdf
    • http://cefasfese.4pu.com/1731736732738734733/Strandung-eines-russischen-Kriegsschiffes-an-der-schwedischen-K-by-Aleksandr-Semenovic-i-kov.pdf
    • http://cefasfese.4pu.com/9734739732735734/Man-Taucht-in-Eine-Andere-Welt-Ein-Lesestrategien-Beim-Lesen-Fremdsprachiger-Literatur--Eine-Empirische-Studie-Am-Beispiel-Slowenischer-Germanistikstudentinnen-Und--Studenten-by-Sasa-Jazbec.pdf
    • http://cefasfese.4pu.com/9738734736733732/Die-Franz-sische-Bronzeuhr-Eine-Typologie-Der-Fig-rlichen-Darstellungen-Von-G-ttern-Helden-Edlen-Wilden-by-Elke-Niehuser.pdf
    • http://cefasfese.4pu.com/6737737733739735/Eine-Studie-in-Scharlachrot-by-Arthur-Conan-Doyle.pdf
    • http://cefasfese.4pu.com/1730733739731738734/Fruhere-Verhaltnisse-Kunst-in-Wien-Nach-45-by-Gerhard-Habarta.pdf
    • http://cefasfese.4pu.com/1731734739739738730/Der-Friede-in-Europa-Eine-Volkerrechtlich-Politische-Studie-by-Eugen-Schlief.pdf
    • http://cefasfese.4pu.com/9732737738736734/Sherlock-Holmes---Eine-Studie-in-Scharlachrot-by-Arthur-Conan-Doyle.pdf
    • http://cefasfese.4pu.com/1731731731738734735/Die-Juditfigur-in-Der-Vulgata-Eine-Theologische-Studie-Zur-Lateinischen-Bibel-by-Lydia-Lange.pdf
    • http://cefasfese.4pu.com/1731734732732734736/Language-Awareness-Und-Bilingualer-Unterricht-Eine-Komparative-Studie-by-Sylvia-Fehling.pdf
    • http://cefasfese.4pu.com/9733732738730737/Aspekte-Des-Menschseins-Im-Alten-Mesopotamien-Eine-Studie-Zu-Person-Und-Identitat-Im-2-Und-1-JT-V-Chr-by-Ulrike-Steinert.pdf
    • http://cefasfese.4pu.com/9735737739735734/Eine-Studie-in-Scharlachrot-Der-erste-Auftritt-von-Sherlock-Holmes-by-Arthur-Conan-Doyle.pdf
    • http://cefasfese.4pu.com/5736731739733734/Eine-Studie-in-Scharlachrot-Der-erste-Roman-mit-Sherlock-Holmes-by-Arthur-Conan-Doyle.pdf
    • http://cefasfese.4pu.com/9732737733736734/deutsche-Barockliteratur-Wertung-Umwertung-eine-wertungsgeschichtliche-Studie-in-systematischer-Absicht-by-Herbert-Jaumann.pdf
    • http://cefasfese.4pu.com/1731736734736732734/K-rper-Und-Migration-Eine-Studie-Zu-K-rperinszenierungen-Junger-Frauen-in-Text-Und-Bild-by-Henrike-Terhart.pdf

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