Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a88728f3a88de94…

MALICIOUS

PDF

49.8 KB Created: 2021-09-05 08:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d691bd5a7088a83a4f438cfec1a89fb3 SHA-1: 2825f25f9caeb1767024f5cedef8f0ef75ebe858 SHA-256: 7a88728f3a88de94f304187fe70d209bbcf50b4967c1e2e2e030fd27cf02ce46
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised CMS upload storage and disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8987

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://kursadowicz.pl/Upload/file/16960755400.pdf In PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608c14b4c18b5---77271579342.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/fd6e02872ef9f78b28b8c8b8e34d66e7/91410439639.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/jedifo.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/eabaac37d88a032b827996a2663f253d/76514608020.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b6be468ca---6720685585.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/hu12lt4n6v4rj6i9psj0bttjnu/50680142575.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/gelin.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/25050942233.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/88815579020.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a228fa0b71---59813091592.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/furufulavinukugadudo.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/zuxixevorexinanikorirawi.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/vagugejawinija.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613397ce21414---zazowonazurusumokugad.pdfIn PDF document text
    • https://kede.org/userfiles/file/30990459763.pdfIn PDF document text
    • http://plncse.hu/php_data/file/pomobit.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/wedubodubibogagemekigapak.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/godamekofibumazebolopufod.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/4f1f33d26977aa17a7171e7daff515f4/93219335891.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/166273335f49e003f6f3cbb1e1dea27a/vapujikadazeg.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e699668e31fab38960b8b1c7714bf66b/jabixuxupixatekave.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/4f439a3ed2f126be105687b60cf6d39d/55618632071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=what+is+phonology+and+phonetics+pdfPDF link annotation

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