Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae4616e7893b8bc…

MALICIOUS

PDF

80.3 KB Created: 2021-09-03 19:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3ae0ac38ccb9fd8741e2bf7b16e76187 SHA-1: e311db6a50b7d1d28a8a24989d75a8c82a7d8d3b SHA-256: 9ae4616e7893b8bc38bf1ddcd6bb45ee4caeaeddef61b6b8b1abfafffab47197
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm or redirection scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The primary attack pattern involves luring users through a seemingly legitimate document to these external links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4806

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/a24e2fe574aa3cba3e75c9e7b6b04637/nugapisuzupe.pdf In PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/18329302284.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/baxekikopumejipagiwuzir.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea69bd4217---33440250216.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/50243369498.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f709f4b33ae---livijapar.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/k022itk98u8vk8mpa5v4td1heh/41595668305.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609769afcc3c0---vupiwemukofi.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/gopuligumomibimud.pdfIn PDF document text
    • http://jaika.in/images/documents/files/788878305.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents//files/42596918523.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/da71172785ac50c5db66c1949fed5651/sugeviduxanuvasaw.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/foruvozudafonud.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aad5f52881d---xerukabogamofegoluzisuxor.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/kufumazikise.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/ccce711c63c7cc0b00be292ae84077d1/kinikabejavot.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/buvun.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/cd3e6de9acadadfac68ca9b6130a7505/35967350378.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d30043ae8b---buvawirusogiwamo.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/95379429100.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/78493704650.pdfIn PDF document text
    • http://ezstreetautosales.com/clients/876244/File/savuvutemum.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/tixogisunuv.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/544604e38938c06c7eeaf6e1f2201a87/gatidokexasunilunudazipu.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b5c23ce07---64601146305.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/kolene.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=skripsi+psikologi+pengaruh+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2E 17548 bytes
SHA-256: edf5d877c9808ce9d81b10e8b451b339b642e56e49322963ac80d9343c9a2d9a

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