Malicious PDF — malware analysis report

Static analysis result for SHA-256 890dfef24a78ad5d…

MALICIOUS

PDF

62.6 KB Created: 2021-08-09 02:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0641b48267592c87c44251ba1d19e130 SHA-1: 11979b719e798e78152f8a9d1a3feeaa208d2498 SHA-256: 890dfef24a78ad5d462dca10bb4a85b72026526f124b34e3c40bcf0d466ac2c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of external URIs and link farms indicates an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8297

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://ketchas.ru/uplcv?utm_term=libros+de+caligrafia+pdf+para+descargar+gratis PDF link annotation
    • https://www.avantagesapp.com/uploads/files/75840225688.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/48749145742.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/66098226073.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/xokax.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079c993a3e98---16754893926.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/fapuvelokuxalojekeko.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/5fb3nhjbc8fmj8ptlbi1nmbj20/dusirunovuxetim.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/mimeruredixogokenulelis.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607c032d2ab25---kepegubupevefobikowasuz.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/c8e3ed74355cd1aa5b91ffd842e4543b/sofoxotuzowudu.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/175090873c8d6542abd4a18234aff57f/sareravufowelefevafa.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/dc8dc016935de68bcba2c057ef12e0cc/56975838301.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/optrtuamr1l54k26o279upm557/wubosiliwijezupezoximef.pdfIn PDF document text
    • http://srutimusic.org/userfiles/file/69989040182.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7f2ff94bfa0b9aa7227e619073c4048c/87317936474.pdfIn PDF document text
    • http://someteme.com/archivos/_20210704232953.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/12574768592.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/ojg8tfrb95te9cftqvrm9v62q7/xudojetixa.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f9f705ffd---koxivasopafi.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/kesisufoxere.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-1/20210501224425683053.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b91fee22126---22282053009.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a224bdca65---57145615290.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/280330348953.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/dumesotazaz.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/lujejipogawivanakene.pdfIn PDF document text

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