Malicious PDF — malware analysis report

Static analysis result for SHA-256 4902d66fd0c2750f…

MALICIOUS

PDF

66.5 KB Created: 2021-06-18 09:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 91f0d0b45e4c1197f3e3cfd0f0f61816 SHA-1: 3fc7eb8b1ac00e355286efc86d59731363630ca6 SHA-256: 4902d66fd0c2750f0427620b2e86cb4aa1eff29dd1d3511fe1ab014b7e61b251
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9639

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://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608efb26e0bbd---28999139498.pdf In PDF document text
    • https://123natura.com/stockages/files/gemapiki.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/6fbd4d7cae97f13baa8afe0d63f30ffb/45129597756.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c69026a56---66264122810.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f968748125---xorunewim.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/lokonarupotezetewafa.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210609001925_714915108.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb7e00a243---19591341775.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9e44558d9---xolekusisasivuwo.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cc20927adcb---44470859785.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090b1bb75c12---77185673930.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/2p03g02olf8cj2j17lljt74lsf/sogopejekuzumitoxiw.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/df96fcacccf2ea501fb1122976e17ca2/nufibunafeligarewemufi.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b06e9ea058f---piratanilebamomiviv.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/nigizeriweluvogexu.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942e09821d8---56953631839.pdfIn PDF document text
    • https://termocasasrl.com/file/96324428736.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/xipalaxatotuwano.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=unblock+orn+sitesPDF link annotation

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