Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7567bd94c635e3…

MALICIOUS

PDF

43.4 KB Created: 2021-07-20 11:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 2758b2478c64d1f2df1e7e43c01f8fe1 SHA-1: 9bf6d5871a6c4ac79b71273900d3685a1ddefafe SHA-256: 6e7567bd94c635e376d44b77954a618b8c023e671cb210b85a7a626b2014517e
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7206

Heuristics 5

  • 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 43 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.
  • 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://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/29b31e19881a6b4feeffb94dfcd37491/80529371188.pdf In PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/luterekosaviginanogowibi.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/pezonivopijexovomegenod.pdfIn PDF document text
    • http://marymo.ru/uploads/files/xijegojapipeveva.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/keferipabaz.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c27b875c164---10036992055.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/vuzimanatilepulezewanemeg.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210628145016_ljk4yg.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/fewonamovukikejibop.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/63101da73b4fa039b8c8e6226fae79cc/61999657680.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/baguwot.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab987d495d---birosuwulazilujidabe.pdfIn PDF document text
    • http://iltorg.ru/upload/file/26046461036.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98e01e06f2---72548947138.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/0499a0458c89538f06c58d84e46d3c15/59379988422.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5e80c956c---dojevipexem.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d49ba1a9b3fa2dc89ec977a2f4395e93/58611462080.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2fcc28fd2---rimuduwewuwiku.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/kkte15i4llktjt3ir5e36l94sd/jizonumukenofino.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075db8ee3ec1---nenar.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/13254082991.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/b2b8139f6d82d720e0aeb31857f9ef95/manedexerotoromofes.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16082d0139ecc0---gatekezeduritelepakilajal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=typical+dihybrid+ratioPDF link annotation

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