Malicious PDF — malware analysis report

Static analysis result for SHA-256 246b6e29587fb9f9…

MALICIOUS

PDF

74.3 KB Created: 2021-09-10 08:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: b48cc0ca752a3cc05d4766caaa1d2c60 SHA-1: 7fe98708dcc00c6e4a0eeb3f0bb132ad1393e718 SHA-256: 246b6e29587fb9f97c612714bd7658523807d41bc46553f9c0e0ed08d2b8fb3d
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 CMS uploads or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, supporting the assessment that it is used for malicious purposes, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier clean score 0.2255

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 https://crewmak.ru/uplcv?utm_term=the+walking+dead+400+days+torrent PDF link annotation
    • http://bajcsidavidfoto.com/_user/file/14775525230.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613952d1a2404---6568357213.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/xinotukuvat.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/89888614858.pdfIn PDF document text
    • http://wernitznigg.at/files/93703652783.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/namize.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/44927571795.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/verapusijivulu.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c2927c247---kerozamojomenamov.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/xulusunavulikalawa.pdfIn PDF document text
    • http://jmyhship.com/uploadfile/files/xojuzakedogo.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/kodakibogezapovobem.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/kitaxeviz.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/97918860190.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/75861082145.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/33288230460.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/1381984037.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161362dcf01769---95034444984.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f93cb290a---maxifiwelolad.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8b26bb9c1---91576341464.pdfIn PDF document text
    • http://chongthamphucthang.com/images/news/files/gadexikokisibepiluteferex.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/lawepibodebo.pdfIn PDF document text
    • http://gzsjlt.cn/userfiles/file/8916452087.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/161348f295af12---misorefusonujesuj.pdfIn PDF document text
    • http://rentaruedas.com/files/others/63526109969.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb6747ada9---sixutigufufolaw.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_off0000ddb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CB 17812 bytes
SHA-256: 5080a7f4b634791c79c15237c3592bb65de69a497de6f3ba8f34a55152013157