Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b4b8751eb27a0c…

MALICIOUS

PDF

42.2 KB Created: 2021-06-26 01:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f10541f45d03c928d8dd0c905b4c0e52 SHA-1: 4d0cbec324d9b7d9b458cfe31924cbce6e2d1977 SHA-256: 67b4b8751eb27a0c9fdae328ae897e9793eb49ef2c69555246b9d2f88f6e22a8
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document utilizes an image lure, presenting a full-page screenshot to trick users into interacting with embedded links. The presence of embedded JavaScript and numerous links pointing to compromised CMS upload directories suggests an attempt to deliver a secondary payload or redirect to a phishing site. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7634

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/f6442e4ec4f48969182594bd3002f874/bugezasezibajigir.pdf In PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/3d1ce05d16449eac68023ba28e428bff/3446430491.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/97527098363.pdfIn PDF document text
    • http://biosite.ru/images/news/file/zedonu.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608a648a026e6---rofogunufajowamenutev.pdfIn PDF document text
    • http://sdds.be/userfiles/file/7537440962.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/f6ad84b8a9ea43be6575757d9c04b8e2/kegedozilajekipadiki.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/pawibajobugisuwoboxuxit.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/11f16fb09d1a4a6751be62c29259b78f/54778025753.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b33ad096a28---wuvamejekomowarevik.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d950113d1---21938567871.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/71799887843.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070df5d00fe4---ludawogas.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9be4a8d77b---mazinizuluwisilikuzimamo.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/eb4dc142f5a243e05a86296b62408764/73463474231.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/gixovajibolorujen.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/zupiwape.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/52598192073.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/3311469650.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/84343843756.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/68941858707.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/hd8n723c4sfql8sj6bhqlout0l/fusokot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=pcos+without+cystsPDF link annotation

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