Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd5c8ccefe2c6b1…

MALICIOUS

PDF

73.4 KB Created: 2021-07-07 21:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 546e7daca1b953b0448f289a3ccdc0b3 SHA-1: 476eafe59d707620870f6f2d10ba9666cbfb7317 SHA-256: abd5c8ccefe2c6b100e92b744de67b292b319e49e2e8b9a6269e71d7f23c9bd3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as containing a link farm pointing to compromised WordPress uploads and disposable hosting. The ML classifier and ClamAV also identified it as malicious. While no executable scripts were extracted, the presence of numerous URLs suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6678

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c75052e21f6---bemosaburew.pdf In PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/kl6r6jjlsadddv95c6mgjhetnj/82550689437.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/99e01ff9e7b8d3216e1c474e8b0db768/derolilujinera.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210507072115.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/3404879058.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/83254726509.pdfIn PDF document text
    • https://numberonerevolution.it/file/78169461141.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/f22e47bb5d777b1c8afdcc48f5cb5023/nupudaxuwakerugiwudetaf.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b50f8ac0093---88622881931.pdfIn PDF document text
    • http://nature-revive.org/files/file/66244277406.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/mixaduruwodipeli.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080531b5f688---63054891577.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/pujukobekiwuforizirerivuv.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/ac8819e6f2b3c230308826f7230dd8dc/96123493207.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/79131d002eff39054c88223c5695418b/14946811005.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/7f2c03f97491994ecd2130089c2a95f1/18546531064.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076c75066e36---90986792280.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073d590614b4---47628176382.pdfIn PDF document text
    • https://rinducm1.com/contents//files/40575411908.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa35dc22e2b---merefuvuboradimo.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/94188208886.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/1b8a7b9c1ea924a919b467f3e63830d9/49180882548.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=50+beowulf+complete+upper+for+salePDF link annotation

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