Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea1ae0062326000f…

MALICIOUS

PDF

49.8 KB Created: 2021-09-08 05:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6c297cb213c4262ea25407da70d0e8a6 SHA-1: f236edb002d8f1280cc452f4cfedef0764f1e5c2 SHA-256: ea1ae0062326000f03edc23b6c64e78bf280bc40cae45460f2d57fdbe8b3ea1a
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS upload directories, indicating a link farm designed to host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs suggest an attempt to obscure the final destination and potentially leverage SEO tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6770

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://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/33c7adc5f88ce73d5537530b5fc741c6/13803167598.pdf In PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/la230ejoa34j31ridomalmavf2/ritupeweseguxobetedota.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/32060603423.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/10e923a34e0bb80aab72f3628f21b017/5421580875.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3f7b9017f---lijakazukomuf.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca0fa931e6---92571466551.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/776c995bd444a7bd270c95d2da607027/karexela.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/55498805548.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26df84cf21---tetemajomob.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb0d8bfd53---69031764941.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/6mifh7m9hmuk03dd4fktlo9o4j/wisegepametulurosi.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/86153747111.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/23442266620.pdfIn PDF document text
    • http://zubrcup.by/files/files/guvalisole.pdfIn PDF document text
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/46371522594.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/vewevubufolapumanopajon.pdfIn PDF document text
    • http://dlmberatung.ch/userfiles/files/33237516686.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c79bdd342f7---75923331327.pdfIn PDF document text
    • https://garnet-medical.com/userfiles/files/75754869057.pdfIn PDF document text
    • https://kar360.com/resimler/files/82096880572.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/desimaxobejunozegef.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40c35aa7af---33897557416.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/bonebu.pdfIn PDF document text
    • http://coffee33.ru/archive/file/belebunanad.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/rikinipetefivupezesoluk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=trombly+terapia+ocupacional+pdfPDF link annotation

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