Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5bd7a0edf09ec9…

MALICIOUS

PDF

46.8 KB Created: 2021-09-01 01:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 75634b99357f9f595b74dec14418aaff SHA-1: d0f41d8bdcec4b2858897444147b20a20fecdfeb SHA-256: 3a5bd7a0edf09ec9d90acc230e26642c5202d3fbcd53ab6196feead42e128852
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9205

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://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/ca7a83c2136e9afe4665b1b3d50fb44c/53309286929.pdf In PDF document text
    • http://palaciodelosnavas.com/userfiles/file/ranawijofowijur.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/b354bd3d01a04fdc58414d8594cd4847/43709231359.pdfIn PDF document text
    • https://wagaskar.com/media/nopivawubuti.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/64452102680.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-08-07-22-06-12-dp7yUeHU.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/vakuwosufisawunowuw.pdfIn PDF document text
    • https://airbays.com/userfiles/file/xibuja.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/lekejisujuxifodolosoxosi.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/bc5fcb3855f8c3ab6dfdfa468bad5c8a/39125502411.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/sefanibezusoda.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/61768838950.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/3c1f8d90ecda6fcd4d01d433aa6f918a/dowedozomasozif.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210718041647.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160dd8c132ba52---kapimupejusidoxubas.pdfIn PDF document text
    • http://secretinvitation.net/images/files/45867101797.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070830d616a4---golawap.pdfIn PDF document text
    • http://tyextractor.com/d/files/16926671425.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=iodometric+titration+of+chlorinePDF link annotation

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