Malicious PDF — malware analysis report

Static analysis result for SHA-256 8103cf9ff212bd48…

MALICIOUS

PDF

107.1 KB Created: 2021-09-05 13:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f87adac6f7e649fdec3eaea330735664 SHA-1: eed0e6ccb28af5bfb93f81732b883985313cc1c9 SHA-256: 8103cf9ff212bd48dcf9ce08d2b4ba854aabb1fa81262cd4836e1d1f65f6cd32
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or directing users to malicious content. The presence of external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier clean score 0.2222

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://smidgel.ru/uplcv?utm_term=mastering+emacs+pdf+download PDF link annotation
    • http://from.ua/upload/articles/2021/06/19/files/68993567898.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d210a6c148e---vakogoxepirulu.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16100c90fb3707---jejamumek.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd955dfc6b---6090360354.pdfIn PDF document text
    • https://soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/kiladifo.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/dagutolexefolu.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/mps3p4h931d81e1mqlloch00a5/samovetararikoxen.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/verilaxivubifametopu.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/68d674f786997f96df858c453ba05e4d/fofatixonorapepigijevolep.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/xumakalomiboki.pdfIn PDF document text
    • http://hijoin.hu/editor_up/12482220472.pdfIn PDF document text
    • https://stopserv.ru/files/file/zagozakumuwokiwijiz.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/t0ejj8ctdfj9qdma6ogh5c7cm1/85040831626.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/bedepevufagibojigubaninod.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b30c623f6---40146995535.pdfIn PDF document text
    • http://zlato-stribro-investice.com/upload/files/negad.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/95270112797.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/kamamitap.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fbe5a62345---lidogom.pdfIn PDF document text
    • http://kclandscapes.com/ckfinder/triplebuserfiles/file/viwuditobako.pdfIn PDF document text
    • https://paperland.bg/uploads/file/83815807942.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/velar.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d303fb9508---xavesiganevalibu.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8c10d7aac---sojunebi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C76 18896 bytes
SHA-256: c85401358f6409a556934b2b300455ee83d93c90daf9f46979b16b0c17607268
font_01_sfnt_off00018cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CF7 11040 bytes
SHA-256: 2427c458144ad12ff5a3f067efd555b590ab947bc1facdbb913bc26d648a460c

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