Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb76dcefcd84b863…

MALICIOUS

PDF

64.0 KB Created: 2021-08-24 17:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cb29a29447e41262bfc5e9555a3a77c4 SHA-1: e17d6561b95c2d39723b48f7c32bacdd6f35c301 SHA-256: bb76dcefcd84b863b3d9080756e0a794fc9c64f857ad1af9216c0b728f583a53
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious campaign, likely using a spearphishing attachment as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9723

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://southtours.com/wp-content/plugins/super-forms/uploads/php/files/3jkslu03vjnpn4d22h1hk2gqnl/37127732196.pdf In PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087ff970dd8f---94916814562.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/ropepujirekotigumawu.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/bowofulelediferaserox.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/35589208538.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/duditonikixez.pdfIn PDF document text
    • https://alajuusa.eemedia/contents/file/vejuvelagowukolanumuvij.pdfIn PDF document text
    • http://iltorg.ru/upload/file/zogafikotono.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd26dabe1a2ad137da3eb2c279f136f9/96712839098.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/pagizokuvuduredatovi.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/84661505587.pdfIn PDF document text
    • http://fitviewer.biz/files/file/lusewexef.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d94bd6eaeaa---74460386275.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/v6p6fcijmgrdnu485crifr6ucg/43280761258.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/7518178601.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/zalevawarumitajawaw.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/sumewugasazisekadewadoti.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/1301234018.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5edc127cc8---suvuduz.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/040713993338a786ee26e01781bea621/72817941645.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/lawuketowizujuguze.pdfIn PDF document text
    • http://lhsclassof1971.com/clients/74120/File/7672084331.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075ac555b6bf---junomezipawunokasiruwem.pdfIn PDF document text
    • http://medrea.ru/upload/files/63293538426.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=sample+letter+for+witness+statementPDF link annotation

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