Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a268999a6295d66…

MALICIOUS

PDF

53.9 KB Created: 2021-06-12 18:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bb434cd6b29e726eca25cc059b0da7f SHA-1: dce852eaf7a1547a8baf2f5d4e335631b8d56c8d SHA-256: 6a268999a6295d6680a0d04c9321931984e64a957a7041332fc2f501b15f582e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external links pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document's structure, being image-heavy with minimal text, further supports its use as a deceptive tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6272

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 53 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://cructi.ru/uplcv?utm_term=powerpoint+school+themes
    • http://nail-free.com/ckfinder/userfiles/files/texakewedemunojikoko.pdf
    • http://holzbau-napetschnig.at/mudopoxupudevamesakiseva.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/95c2ff6dc8652722a9082e6a6e6ad2eb/garoxetupa.pdf
    • https://lensprovn.com/ckfinder/userfiles/files/65038805506.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/7349fe37e2abfa5334f36371976dccf5/92374379478.pdf
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/21791067732.pdf
    • http://aircond.md/upload_fck/file/kojekoputerewetupegeto.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/119c4bb73eb00bc4e64597783153744d/daxin.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c45d75a9235---nukumopojidifimar.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecaa115b78---kodumonugibedozawovufe.pdf
    • http://gemculture.com/userfiles/file/87303969620.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/pmgrjmhsb8kqka55ju11873fo1/buzovulewibija.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/fb3da88e125395eba97aeee948b7108f/genotumomujasisirevopa.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3588537d39---99681597738.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/b558105919dd4e55bd5226f990379bee/tuvukipiz.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/1jovpi4q2isoau5r5482rkldej/tesuturozopagiliriso.pdf

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