Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd177be7c3cc55f4…

MALICIOUS

PDF

73.0 KB Created: 2021-07-17 20:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bf030f8fe8e1f5bc65ea9d73def114ad SHA-1: cc03541df35b9bb7cbbb73df644c38a60f0d1e77 SHA-256: dd177be7c3cc55f454fe87d6720b3900fe289dbcb973f8495b8bd0935afbabc6
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many of which point to compromised WordPress sites. These links are likely intended to manipulate search engine rankings or serve as a distribution point for further malicious activity. The document body is heavily obfuscated and does not provide clear instructions, but the heuristic firings strongly indicate a link farm hosted on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4729

Heuristics 4

  • 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://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/ed967e07ebaf8590a7f06682d9c3ffc4/kuxeligulonoj.pdf In PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701ed50292d---lenop.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///somilavijokewopabotif.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/gc1gufuk6h5e19dof9h2a69o52/padokuf.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926f3be115b---70202106713.pdfIn PDF document text
    • https://congchung7.com/upload/file/4220385776.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a019b3d9335---kofarudidafa.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/fb4b2c80e739cc8342d894b0f1b53bb5/50062276123.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/gepevizu.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a646ff42cb7---mewaguzetikedilaxema.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eff03020c---vofupunufesatuwolisu.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/91513650392.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/1b1a590fa8f0eda20848e5f03eb70880/wubivativifovad.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b321df620---pafemejadakubuduk.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/neribe.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/85402595045.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad6ca3df25---pazifiluguko.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/32142849849.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b7d5a2f6e---14469128498.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/kixawipikuvupokupolono.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/e497733757eaa28491392ed45fa40d47/51192362648.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ju3abqpl2ifaposf2jdoc40a88/vemebepa.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/89900311630.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b37d77c8f65---werokozojav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=i+bust+the+windows+out+the+carPDF link annotation

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