Malicious PDF — malware analysis report

Static analysis result for SHA-256 87bd469b47be4dea…

MALICIOUS

PDF

62.6 KB Created: 2021-08-14 11:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5e0405e1e40fb00fa21f61201b0e6b97 SHA-1: 471f93c69d1c3ff14168315233f30b8fa215b947 SHA-256: 87bd469b47be4dea561a3cafbd9c54381ccca57dd770534cf56154fa6a27c52e
154 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple domains, many of which appear to be compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary purpose seems to be directing users to external, potentially malicious content through a series of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

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://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a69baea06---pozolexugosisewumi.pdf In PDF document text
    • https://www.roadsafetyrental.com.au/application/third_party/ckfinder/userfiles/files/62649984472.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/tiwowenaxax.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160df4eaf1bc4c---totemete.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/8ffc4ef533f91f91ec5f045b22f478b0/suwiwuwuxibegerezad.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/327582634.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210606065757.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/69d8ead3f283b165261451c0cdf3d521/39477336586.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/dfae3c030ace02c51182b665c2d79b0f/2899401839.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/kiguvezifafojuxixamekivul.pdfIn PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/2048208518.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/4151866390.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/15453989720.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b788e5132c1---67751052324.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/76348152638.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/0531973932bdc0e9ca0bd6655f8f0531/beruda.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/33893092843.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/82168fb60aa59458e08fc5833155e2e4/nepapubazenififoj.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7a3e744ea---71722612454.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cd42b803f8f6de03513917a45cce9ed3/jalilifen.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4385c8ee55dbbbfad0f7555f565fa4cb/14727987889.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea63b104dc---jinukijonutusajonesetunif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=who+moved+my+cheese+summary+in+hindiPDF link annotation

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