Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd3d765182947ab…

MALICIOUS

PDF

53.1 KB Created: 2021-09-04 09:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5d38e8d76ed3d38c0918758f9540565a SHA-1: e7aade23802c370f8411d249a305e267471e0084 SHA-256: 9bd3d765182947ab88848d83d055957b8506b49bd50b104b1d3d5910f38cf84e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms on potentially compromised infrastructure points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5591

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://irlanc.ru/uplcv?utm_term=fundamental+rights+vs+human+rights+pdf PDF link annotation
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160717ec436afb---69620164832.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/gosepawised.pdfIn PDF document text
    • https://fallsplat.se/file/xefubebakijakiba.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7b6c7508d---novodofokel.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/43070a7cd9fe1acb30478ca2a3ad4440/57532625291.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/76573e50bdaf16fba95e8b75ab7540a6/jaxugubakijubana.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/31411821802.pdfIn PDF document text
    • https://ancoraeducacion.com/images/nixolafu.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/77832148097.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a97b351dbdd---vujibunadozifaxe.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/iiiouqju9b5ooj3eoj3ovasuk2/64012283943.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/41311259105.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/lowejirufoxovoxore.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c8e5e2cb5---10305451657.pdfIn PDF document text
    • http://ijfbn.com/editor_up/baxejazakifufi.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/9d03a07ecfe2624ce60d7d4f72c65c0a/83374634550.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/mexedikutenusotinom.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/8e7f09943f4725d3719df03a0290f90a/lisaxizasovema.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/55143263082.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/51495658829.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/togubiribo.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/1c6bbdb3ee5ff0f0961ed63ecd410b25/89208528101.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/85449895744.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/5917ced7e74ebaf4db07bc7a82ab75df/4402291.pdfIn PDF document text

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