Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b6d1628f3a243d…

MALICIOUS

PDF

63.6 KB Created: 2021-08-24 20:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7f0bb778561ea5de0640052d2669f29b SHA-1: def4502adbbb006817829ab57a2cc8cfb07e2e0f SHA-256: 91b6d1628f3a243dece9af22479a4cf248090a580faa02f97397de480affb6f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are designed to lure users into clicking on potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9517

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://mientaytourist.com/uploads/files/wekekiparugij.pdf In PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/a00ce8f33944ff854d333602f349fd99/84763556400.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd235cd085---kosetebet.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9b2049c5a---49391779414.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/9901838818.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/kajisizafajimu.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/3de813a4048f028bbdc96d3726036562/jomesesutil.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/tikazanujutipolimetefe.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c5803325b42---8469442462.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/22407307105.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/27294732640.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/39561984798.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/72368084744.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b7528d2fd---jimodezugatexivefuge.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16081e28ada282---36251209774.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c12e7d7cb23---80299900377.pdfIn PDF document text
    • https://dm288.com/slicice/file/20199381368.pdfIn PDF document text
    • http://ipllaser.in/uploads/mibadujekux.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/47823045610.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608016598baa8---noripaw.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/17926188823.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/fnqrdb5r2pahp0ghu9kg9bm5g6/53709638663.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac57108211d---sekez.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070da551e137---43292121968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=introduction+to+solar+system+pdfPDF link annotation

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