Malicious PDF — malware analysis report

Static analysis result for SHA-256 429dc62fbade9959…

MALICIOUS

PDF

128.0 KB Created: 2021-06-28 15:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d3c27a7a0e6e1b980bc43294a2dc150d SHA-1: 54d0554ae9d421dbbbedb77d37fbfa82b21508d4 SHA-256: 429dc62fbade99590372e967a0fb7aa8a92535b9f582269fe81f6cbaf95901fe
124 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malicious redirection attempt. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not intended for direct user reading but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4607

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://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc93bd5eae---xuvelomifewop.pdf In PDF document text
    • http://creptiles.dk/userfiles/file/bosozemotiv.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/7f248318091a33803d28b63b7546d5ee/donajejunigezuwinipuzape.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1e464c6f4---25938492402.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce5c854520---55538161965.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a704ae9c868---sikusiwit.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/61926222254.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/f7044c90db10bd0793c1f552ac8fbeb5/34734521338.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/3utm61cf1721c99cu2tfi93okl/pesemabibowemetar.pdfIn PDF document text
    • http://stepsforstarlight.com/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/9177786753.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a00e82a58---barorupoxoxeka.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/fuvosezil.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/5c3e49599c2557043b3e7eb97e017216/refirosu.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/35733816130.pdfIn PDF document text
    • http://maihome.hu/admin1/file/30575811506.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/5323975c5563b881ae91c6fb54465ea2/69297607512.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/0c1b5ac8c6a8de0e656fadbd72bc2125/janodaraxalagowaseromu.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606efbb7026b2---zabis.pdfIn PDF document text
    • http://gptools.net/userfiles/file/79212145911.pdfIn PDF document text
    • http://navigator-33.ru/media/file/87528658869.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b006649dad5---tutiwi.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/ditale.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abb5ccf538---sugojotemolobuxagutok.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/5789c10f12caa266d85c268b4f979c93/kusujenevo.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/8139d2a413728a3292c70d2ba8284d50/xesot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=well+meaning+in+gujaratiPDF link annotation

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