Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6453293e4659f7…

MALICIOUS

PDF

57.4 KB Created: 2021-06-20 05:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: de50e95b27d3d1890a44c8f9e49d551e SHA-1: dec129879c667e060588a6944fbba2d09458a744 SHA-256: de6453293e4659f70d98ce8c6c84284cdb08cab0d21de323a2b86d9cdb904f6e
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, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress instances, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The document body, though heavily obfuscated, contains references to '4th quarter report card comments', a common lure for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7086

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://kopari.hu/files/file/topawalovokosekivawoxiz.pdf In PDF document text
    • http://agiusfuneraldirectors.com/files/file/gikelupovebepafotagig.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/j1i7tumlujf20oo4hm0er7sd4k/velovujiwogitoguvajepila.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/820f10f5ea4593156b83296105deff42/91306791423.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afe13096ed1---jijujidubetegogajud.pdfIn PDF document text
    • http://tipiland.net/upload/file/16118056666.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/ef87264d8046cb813d96ef9f5c0bedc0/12156760979.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/db21bda565c4bf69d2f1210b44108fd4/kodasiserofaruwomokijom.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/h20c9v7ogs0ahk8q77fsl6tc75/19460814387.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/dbd4c6fdf1515c270b04e339d5057583/8130252736.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/73a1e71534ae4d8189087cb84dfacda4/ruvokemafijipoxaj.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/0510ec17f0b24ab51cd8059ec9e83511/ropagoxawirigaromof.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607460dc55204---debabezazisuf.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d22920e2f---refaxubigowow.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/55f3c455cb4fe064ec29a8f8257e5260/wigovadudogujujejazoruz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=4th+quarter+report+card+commentsPDF link annotation

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