Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b820552473fe850…

MALICIOUS

PDF

48.0 KB Created: 2021-09-03 04:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2cb57fb77185d62def9ef91a7a829e5e SHA-1: 2d7a8670bf840b51819d6553a8d60da7daf91b70 SHA-256: 5b820552473fe85083aa51e72b39d13c10be4e43bf176a06d64f500e943c979f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier indicate malicious content. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7493

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 https://wastran.ru/uplcv?utm_term=free+printable+bill+of+lading+pdf PDF link annotation
    • http://aaz.sk/editor_uploads/files/gogokeletikefeki.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/92855489561.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/fufifapifoluruz.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/39409461760.pdfIn PDF document text
    • http://lagerunda.it/public/upload/file/lamebodibososag.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9241a1c27---90593121243.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/89179421592.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/890d117578bcfdac0d4186941c7676df/39382233266.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/giwiderakozi.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/51601887203.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/zufozobijebanurajixi.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/dfd88cc0c0f3095e7f367adb598a9af2/mesirexufewem.pdfIn PDF document text
    • http://goldmustang.com/files/files/10637486022.pdfIn PDF document text
    • http://budka39.ru/files/64740254967.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/62ca423a6f8a1a04f2b858694dbb49d8/sisaluvupugizela.pdfIn PDF document text
    • https://amblamy.ee/upload/file/75678247945.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/8d507ff9307650e2f7a212118e97058c/zixijipezo.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/nefazezogigowuvusutuzuza.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/2o1inm35a42gukqkgd7lom4sc3/49828896032.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/juxonalulamivunulevu.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/77197145419.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/f6b457ab1c8e9114df4da146bad329f9/27891144377.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///65503728986.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/898da67c0857c73c1634c089716e6860/47678244386.pdfIn PDF document text
    • http://metallpress.info/files/90397802980.pdfIn PDF document text

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