Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbebf2e2f10ca69…

MALICIOUS

PDF

81.7 KB Created: 2021-08-15 11:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 6607ebd9b06a8a05e2251df60a596281 SHA-1: 977983bba367eb9b7649ce22478e57d0f0ed49fd SHA-256: 3cbebf2e2f10ca6995fcf780136eb4a22240337729d01dc746f72f79b5d1730c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and 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 0.5466

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://shosholoza.de/file/67944434726.pdf In PDF document text
    • http://hoinhikhoavn.com/img/files/gixasozuwafugov.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/7452369065.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/90e7694d75184684f812a94e7744e89b/47445256238.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/riwekezeg.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a13b9092d9ceb7a7238e39ec9fe83152/67839086849.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/sitikutaxatus.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/57e65f2f2a397f076f2bb39872823094/13269139937.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/fba67ecce54a2c2a941de43a1aedf7b5/xiper.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/0fe5e3f81827d75b91a3481c28a24095/lipirepapinusapedosup.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/kamaxul.pdfIn PDF document text
    • http://mcleod-bobbitt.com/clients/64742/File/megolerikujitulemog.pdfIn PDF document text
    • https://stopserv.ru/files/file/zanovuwidawixufubotez.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb7b0a9fa1---vixukone.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210718022654.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/610c6f7e59d1794dd0ad97b430cc552c/20680248679.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f6423dd95---junurexibogepu.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087153138246---wijamiwim.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/2m6ras4p36kkanqc9shcb05873/tarivedufotepuru.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160feab7ab5a02---jejanuzarefoxule.pdfIn PDF document text
    • http://maihome.hu/admin1/file/pifabexijibifatuti.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/devipilenevub.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/85833139055.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/8ff1148f76141f091f1b002c96ecac20/83648963996.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/vesuvel.pdfIn PDF document text
    • https://priscar.com/documents/files/pevitowugixevan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=administracion+de+empresas+libros+pdf+gratisPDF link annotation
    • 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_off0000f75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 11084 bytes
SHA-256: 236e13a5c0a7a521c264456a1efe366b306f1f9e69763905a5ed6d191a2b7f98
font_01_sfnt_off000110bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BF 19240 bytes
SHA-256: c43b67d4ea60d812624a0174dd3c85d9fd02fd20459a20d2a99025c75d7c158b