Malicious PDF — malware analysis report

Static analysis result for SHA-256 981a15272aaf0397…

MALICIOUS

PDF

70.7 KB Created: 2021-08-08 18:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bcaf552f2fbaf5c02da54be0863bb0c6 SHA-1: 08864a56e45dfc229c90653b564de0a1138b1da6 SHA-256: 981a15272aaf03977994a3ae49ba0424245c3d9a53d36a3160515b79cc02d88a
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate a link farm designed to direct users to potentially malicious content, consistent with phishing or SEO poisoning tactics. ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5948

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://perfecthospitals.com/ckfinder/userfiles/files/pepurajesupukanosiwifuf.pdf In PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bb4f3f581---78309819524.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/69315123673.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0c3b833844f6b3d1415b34c7ad2b7ddf/gokuf.pdfIn PDF document text
    • http://safarang.com/basefile/files/33256733274.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160877a014ffbf---39455177192.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/malokepewemabu.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/47736144825.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/p4gg7c4obgqejpm1oqnr84g34v/devemubip.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16234243729467.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/98091349535.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dexuludusarifabo.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3a149dfa25---41580883672.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/gixowujinesogawefelite.pdfIn PDF document text
    • http://lighthouseofworship.com/clients/44803/File/vemetafotopidu.pdfIn PDF document text
    • http://propellerclubsandiego.org/uploads/files/88292034390.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/uq2karsbsllphjcgrdgmoj0cb2/66483915496.pdfIn PDF document text
    • https://soechi.id/userfiles/file/taxanivo.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/77svn6hdorj9k7dmb0da1rk813/18313867580.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1627858843.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/6588f09fff6c763ffd71a824d6e271e8/88312420322.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a2a9596ed---7477404048.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/39c4f7823f368ec975290a740e021108/waxupogilunelidusaxovuser.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160af1e2d86440---wilerosuxosuluzato.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=what+does+cmac+stand+for+intubationPDF link annotation

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