Malicious PDF — malware analysis report

Static analysis result for SHA-256 6430d4bc9f8be3e9…

MALICIOUS

PDF

69.3 KB Created: 2021-07-09 03:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e87aa4c34ff172e68a05f524712a7c46 SHA-1: 338ac2836b81af9155bd2e517f8a15cb8480a42e SHA-256: 6430d4bc9f8be3e9c688f5fd3de6ad69dc334f64713903f0a5665a40f563e752
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware delivery through these links. The document body is unreadable, but the heuristics strongly suggest a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6678

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/2670184e29029d0de8ceb99bfd994f13/mewanebelolanoburoleti.pdf In PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/68084407079.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160973e05a755c---vakovarudajerotexataj.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1222f36e7---71167258495.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/3821652014.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/0094fo6ut15rp4eu4quc97j8cd/tozer.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/ugibna38ae72p6g6mq1ntbbkvs/5193271195.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607741ae0f60c---822062754.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/54917140609651797e7ec.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/wemulilotegadis.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/ca7358b2f7245ca35803a5fa65130f13/zutabitisugamiwo.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160acd453b8752---88859828815.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/18253096722.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607822a536364---noneloxebunoxeweposezu.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/noxutofajivafabi.pdfIn PDF document text
    • https://t2sc.me/userfiles/sipidebisolimofi.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/47442639268.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d2f569b67bfee07d2f69d3c6d00a317e/jovelepipaneken.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/45251489558.pdfIn PDF document text
    • https://aneri12.cz/res/file/nowidevezisoxedudu.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/3226c6689be6de838d6184fece11531f/84888192370.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d881115de5---wijoxavufezeboxinuzofeju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=8+red+coins+shifting+sand+landPDF link annotation

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