Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c1952c2e5c40b7…

MALICIOUS

PDF

71.6 KB Created: 2021-08-02 12:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c16b685c72c8b0e7d2b6e7c4cffe5cb7 SHA-1: 80932191eacb90df87300617d40692974b222eac SHA-256: e8c1952c2e5c40b7a3e6c3c6f89758d58fff01752abf3adc5ddd97c6eb0296b9
154 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The presence of a 'link farm' heuristic further supports this, indicating the primary purpose is to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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://garglob.ru/uplcv?utm_term=harry+potter+hedwig%27s+theme+violin+notes PDF link annotation
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a788ae451c3---nizuxalarurunalob.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16095a33018450---92907339168.pdfIn PDF document text
    • https://vestol.bg/files/file/satadomijuvebafiv.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ca10c7d4b---fesanopebiwodakafadifid.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b181fd9c388---moposudavovo.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/fce6ef97da4401083f6a5148f81540aa/35824141412.pdfIn PDF document text
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/guxepowowe.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/wegiwesubotexinobora.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/peledifipexute.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/468f21c014ca620e6846b0d03f9bee1f/24375030250.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/wopez.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/f835c464b8f2c1ac07515d5e3cb5d498/xoziruterapi.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/geporupobojiwumid.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/31539135149.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/19942557700.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5db6da2a7---mapofupovaki.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/zuzegefumopekawasekemul.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/1g6su073rier9lbl98aamoeo44/mopetejazedisuju.pdfIn PDF document text
    • http://whatdwellswithin.com/file/solesaxuwoxegapoxadur.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706b4b013f6---73746598106.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/4f3063fa95924f348625aaf1aa8f6c56/nuragebiwunanalokalokus.pdfIn PDF document text
    • http://babamoleskine.com/files/file/velekunubofewuterafuve.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160773d2dcaf0b---bivalanisoju.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/b2c590bf747569b2733667ca9e8ee8fa/mopazawezisibi.pdfIn PDF document text

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