Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70c330baf17bdaf…

MALICIOUS

PDF

58.9 KB Created: 2021-08-15 02:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 971c2954b5ca3d77977e11dc4aadc6cb SHA-1: bd6ef6e9f894c6c9f8c064e20ec0f405515a1b7f SHA-256: a70c330baf17bdaf09b345a16236610c0b8dadaaab661862f1b9663af094b639
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URIs and the nature of the heuristics indicate a likely spearphishing attachment used to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

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://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842aa75e6c4---tiberuniposebo.pdf In PDF document text
    • http://quangcaosms.org/media/ftp/file/bufutexobinusabeteto.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/14884676968.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/06hndjeoi106prtd5fpbflll7v/76001589210.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/g3a5fheticncs34i4iaitslokk/zotutexosilivata.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f40069e771d---taxogoli.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f8b1d40bca1---latatebelinipetej.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/7dd69c7dd45abe4402c2eb6c939a7f9b/redodorolipifow.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/zazaki.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989fa93358f---fivijozesowo.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075cdacadef9---didikokusuzabavav.pdfIn PDF document text
    • http://kccmaul.com/files/files/69549416421.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/nerunakelujo.pdfIn PDF document text
    • http://bclgrouptt.com/userfiles/file/23202017934.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/ginarabedelemuwajutelu.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/2d1afab9526214aeab55ed636bca1aa3/75032826874.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/49792c8be3676b8d625be67ed794b05d/kogezurabe.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/48446042455.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/63047691981.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/nokazerosiwabom.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/susanakewurinafeviduliju.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/saxikovirutogudej.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/rugavufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=washington+post+mega+sudoku+gamePDF link annotation

Related samples 8

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