Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fb5f421de4f19d…

MALICIOUS

PDF

62.5 KB Created: 2021-07-21 02:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f2a7f8ed6bba811ca7a633fde74cffcc SHA-1: 2643c13cd8378e846bc8087666dce0a3be6405ea SHA-256: b9fb5f421de4f19d6d26b2c702de628ede15102cc59610ea692464a7575ebe20
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised CMS upload storage locations, suggesting an attempt to distribute malicious content or phish users. The presence of PDF_URI and EMBEDDED_URL heuristics indicates that the document likely contains links to external resources, which are often used to download further payloads or redirect to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5358

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://senseoftourism.dk/userfiles/file/25232084778.pdf In PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-7-7/20210707030413828475.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160845fb68a219---fifipimab.pdfIn PDF document text
    • http://fotobambagiotti.it/userfiles/files/ditexexugagofel.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b0fbb59d6da9496edab79cd4d394b446/59852464100.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/g5r1pgptl9oml40e86622q3njn/4951251259.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/zujomusaferi.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f456ccc65d---76250108389.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607578445da0a---buvijowow.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af5d6a6709e---bexeduderepidotiwimidijuw.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/79405470693.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/texozama.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e323ac5ee1---22195810123.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606da045dc1d8---45824259337.pdfIn PDF document text
    • https://spacio.hk/attachment/file/43882859434.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/de3a004ba759a820de97880666feb718/150447114.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/xixuvomekabasepadabu.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/xazofuxotumotew.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3db6e3892---gixeraz.pdfIn PDF document text
    • http://orlickachata.cz/files/files/23418951855.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/19098122336.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607da1d8bafa2---gatejasudud.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/96650702618.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084d9a511781---5996804714.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/gazenaxakosevakof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=chartres+cathedral+builtPDF link annotation

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