Malicious PDF — malware analysis report

Static analysis result for SHA-256 576393a470eeeafd…

MALICIOUS

PDF

51.1 KB Created: 2021-06-26 22:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c5d7acf695be451deb12455bf0efc2db SHA-1: 6172102640e2d03772f6af9c53eadbb7e51b5474 SHA-256: 576393a470eeeafdf39406e4f59ef8734803d6d1d44e57243067a7a0d604149d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The presence of these links indicates an attempt to redirect the user to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6227

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 https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608511797342c---fovozijukiwetuvak.pdf In PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb6440e4e1---nefijusopafolelevavaf.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/2ov4618e95kng4pef1mrbvum08/dofekixasarapunoluvala.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804aee32791---34594386565.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/xozuvapebe.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/97ij658ugdojtdht8vdmao72p3/farapifilivafaw.pdfIn PDF document text
    • http://matras-devison.com/upload/file/pitarurufowowafow.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a794b1bb577---verapisokopikav.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/22358095318.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160873d777feb7---20108994531.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c9bfa8662---16391769166.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/fubodasirutumujeres.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/8149510119.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/ninixegepagusabeti.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/sozajokivenamimeditixakeb.pdfIn PDF document text
    • http://merwepizza.com/upload/file/63920308772.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/76aa32aebe03b4c8c3ee465f16715da9/1792542071.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/90335373107.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b00535f03dc---91435376029.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/b8ea9454b33e2a1e42f3cf95ed85aa77/pawelexufumikizewomerapu.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/jekivegidevonenezudal.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/d99c82db32b7877d0573678134bb7261/94803307002.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160cb74e58f599---92170491943.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=apa+paper+front+pagePDF link annotation

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