Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acb11ac883b13e8…

MALICIOUS

PDF

71.9 KB Created: 2021-08-16 20:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dc97843174ca89e9d0d2c7086d708546 SHA-1: b3b046e6a0e25139de6ca7758d3f72f19e8ea91d SHA-256: 8acb11ac883b13e8058b5d4723062006838069e8a7ba30caacffd2dd1e228ded
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to other PDF files hosted on various domains, some of which appear to be compromised WordPress sites. The presence of these links suggests an attempt to distribute further malicious content or conduct phishing operations. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9584

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://seamacros.com/upload/file/divinesopizujekozug.pdf In PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/60543246017.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/bawopega.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/67d49ac590173d40b40ce20e707de57c/terexesidabusovufuzag.pdfIn PDF document text
    • https://sgotomotiv.org/upload/files/xukisodo.pdfIn PDF document text
    • https://rinducm1.com/contents//files/10187434930.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/539bb02998f75d906c83a1b85dc5e6c3/lasujurojuluta.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ac63be441---34578601412.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16096bb59575d4---pivifit.pdfIn PDF document text
    • https://alhasooncorp.com/Files/files/8143306257.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/ef0f0661292f4234e7874e385bfa77d8/6433378606.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a248a2053a---77534899104.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/34152843597.pdfIn PDF document text
    • http://orderkai.com/uploads/files/54931340992.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/medalexipajovubifogu.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9d5cbf1d2---gapepofigawejewanatopul.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1705065ef---benisorekagum.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b65d09e3db8---16954988267.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16114782829561---xapezagosejem.pdfIn PDF document text
    • http://yanartextil.com/firma/files/difusebukafolirikonobomev.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c8d274051---mewaganazajedomazug.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/givexeze.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/taduvawoxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=juegos+de+lucha+para+2+jugadores+pcPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.