Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63f280ac1a9d1ca…

MALICIOUS

PDF

43.4 KB Created: 2021-06-21 01:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7c84feb51b495a766a953789c2e4e6f7 SHA-1: 349e8899625ae9ea4262018aacfb71cbe2b16b51 SHA-256: f63f280ac1a9d1ca9d74190f18448e2c08d7c82f9428a82d6b2e44cc2421d0c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it functions as a link farm to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8055

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://gbagencement.fr/uploads/file/92574000730.pdf In PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/a3c4ec0c40ca6aa53de3c77fed83616d/58123504720.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ojdu2qrmhs20oevifj52an2t34/46777825614.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ca6bdb9c2---64887672108.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5dfe62c1f---xekizebataj.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/a4329761f9eb478ea224c456ce72d281/46747712567.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160717aea006a8---gasujubenedoxekewevoter.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921d3f63fd1---muwekilefu.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/7310c0601a17eff60a6a0399764a77c6/56519564618.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/23e2cfa1f79c08ed687380b31b406b46/lojujasekujaved.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608464b9c2752---voromedumezusipedulik.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/gosebi.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/c1b04f58b395c54fbd6f786f59fc695d/52808941605.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d508bf782---ragilaw.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/02c771afcc9f1b3524ee776e4f78958c/69741311256.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/lunifutepisexowevapegi.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/ebc5ef031f3fcfa8e86cfe0b0b2b71f6/wewitovaf.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/zelusutanupododi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=in+what+order+should+i+watch+the+marvel+seriesPDF link annotation

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