Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a05128e4eda06e…

MALICIOUS

PDF

18.0 KB Created: 2019-05-02 19:22:15 +01:00 Authoring application: mPDF 5.7
MD5: 9ccea08bec8868c8de9ee7cfc59130fb SHA-1: b243518557acf35a598820c3a8c75a191f1bc753 SHA-256: b5a05128e4eda06ec77956dff8b973b2f9e76f638246056ac42f3748b8415272
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier strongly indicated maliciousness. While the specific URLs were labeled as benign, the overall structure and the heuristic firing of PDF_SEO_LINK_FARM suggest a malicious intent to direct users to potentially harmful content.

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://xiixmcuin.link
    • http://xiixmcuin.linkpc.net/1201209200202207200/The-Counterfeit-Claus-Rescue-Twinks-1-by-Cherie-Noel.pdf
    • http://xiixmcuin.linkpc.net/4206200201203204/Fly-Like-an-Eagle-by-Cherie-Noel.pdf
    • http://xiixmcuin.linkpc.net/7207201202201201/Blotto-Twinks-and-Riddle-of-the-Sphinx-Blotto-and-Twinks-5-by-Simon-Brett.pdf
    • http://xiixmcuin.linkpc.net/3209203205204209/Claus-Legend-of-the-Fat-Man-Claus-1-by-Tony-Bertauski.pdf
    • http://xiixmcuin.linkpc.net/3204205201208209/Little-Claus-and-Big-Claus-by-Hans-Christian-Andersen.pdf
    • http://xiixmcuin.linkpc.net/1201209200200204209/Zanta-Claus-There-s-another-Claus-in-town-by-D-C-Little.pdf
    • http://xiixmcuin.linkpc.net/1200207205205205/The-Great-Penguin-Rescue-40-000-Penguins-a-Devastating-Oil-Spill-and-the-Inspiring-Story-of-the-World-s-Largest-Animal-Rescue-by-Dyan-deNapoli.pdf
    • http://xiixmcuin.linkpc.net/1201206206204206207/Baron-Carl-Claus-Von-Der-Decken-s-Reisen-in-Ost-Afrika-in-Den-Jahren-1859-Bis-1861-Die-Insel-Sansibar-Reisen-Nach-Dem-Niassasee-Und-Dem-Schneeberge-Kilimandscharo-by-Carl-Claus-von-der-Decken.pdf
    • http://xiixmcuin.linkpc.net/1201204203201202/Mountain-Rescue-Chamonix-Mont-Blanc-A-Season-With-The-World-s-Busiest-Mountain-Rescue-Service-by-Anne-Sauvy.pdf
    • http://xiixmcuin.linkpc.net/3204208209206208/The-Wedding-Rescue-Complete-Series-The-Wedding-Rescue-1-5-by-Alexa-Wilder.pdf
    • http://xiixmcuin.linkpc.net/1200209203202200/I-ll-Rescue-You-I-ll-Rescue-You-1-by-M-T-Thomas.pdf
    • http://xiixmcuin.linkpc.net/1201203200201204209/The-Counterfeit-by-Helma-Clark.pdf
    • http://xiixmcuin.linkpc.net/4200208203202201/The-Counterfeit-Coachman-by-Elisabeth-Fairchild.pdf
    • http://xiixmcuin.linkpc.net/2206208209200201/The-Counterfeit-Killers-by-Bill-Knox.pdf
    • http://xiixmcuin.linkpc.net/5200202201201209/Counterfeit-Husband-by-Elizabeth-Mansfield.pdf
    • http://xiixmcuin.linkpc.net/3203203208203209/A-Counterfeit-Betrothal-Waite-2-by-Mary-Balogh.pdf
    • http://xiixmcuin.linkpc.net/3205200203203204/Given-Time-I-Counterfeit-Money-by-Jacques-Derrida.pdf
    • http://xiixmcuin.linkpc.net/2206207204206202/The-Case-of-the-Counterfeit-Eye-by-Erle-Stanley-Gardner.pdf
    • http://xiixmcuin.linkpc.net/2200204202206207/A-Counterfeit-Heart-Secrets-amp-Spies-3-by-K-C-Bateman.pdf
    • http://xiixmcuin.linkpc.net/7203202202209/Counterfeit-Magic-Otherworld-Stories-10-4-by-Kelley-Armstrong.pdf

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