Malicious PDF — malware analysis report

Static analysis result for SHA-256 65dd08014ee43a69…

MALICIOUS

PDF

112.0 KB Created: 2021-09-08 04:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1e2d230911e0f82023b562364c68edc7 SHA-1: 82ebef4773eeefff905df676c25c1780c8b3d084 SHA-256: 65dd08014ee43a697a57fad43f540933699345fa4e35789d1f8372e5af75cca9
64 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm for SEO poisoning or malware distribution. The heuristics identified multiple PDF link farm patterns, suggesting a deliberate effort to leverage these compromised sites. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3929

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 http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/8fa444916b02edf3e0be6760c8cd1810/xujep.pdf In PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085a4e78ee56---pudegodojejoda.pdfIn PDF document text
    • https://superchills.com/userfiles/file/vububovefalodiwajitozopo.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/161245e7da65ec---36137815812.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608327068f247---73711595815.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078df7d7bbaf---bodebuzaseto.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/43354494104.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/13070091757.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d626ab0d473---93768041263.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d367eb07ffd---22517291640.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/mavukuwojofar.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/visanivex.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/13749426221.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/mizivazopebinadona.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607657983d6e1---76270934518.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/68802662462.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a05939588f97eb8d36f6fb9d7dceecac/6314620974.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/de792d108363329746db6234d433d5f2/53730706318.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/lufekanamokuwedozuliri.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4737dd576c---3944679551.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4796d8aad---zakamajokinizafoludel.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/f0f7754336af7fb689260788e79e3937/73283200640.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/gobudebeminu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=autobuses+madrid+toledo+pdfPDF link annotation

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