Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0e3305b0d40a66…

MALICIOUS

PDF

87.3 KB Created: 2021-09-06 09:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7d4a7ff5432c02e6a646097413214879 SHA-1: f1e084dd78948b4dcedb9516a950226cdf012b17 SHA-256: 9c0e3305b0d40a6604ac83c3dbee2efa84f633bf33c1652c51d0cab446b9fdfa
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm, suggesting an attempt to distribute malicious content or conduct phishing. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, with no clear user-facing text.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4503

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://ketchas.ru/uplcv?utm_term=industrial+robots+pdf PDF link annotation
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1611a3729ced09---25669917991.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160ccd6c93ec6c---52409985111.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/43337799861.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5448a44c8---vujitozixujomi.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/52427760365.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/tilojarebelogu.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/zivegadavirogomonixu.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/1a943uu77sik1nqagf36cg0kr5/22155817391.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/77975740299.pdfIn PDF document text
    • http://deborahbrown.us/clients/860103/File/75750610517.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/latenob.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d04bd96444---nivimopetobawekemivovad.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/49815917004.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/u327m7gqk3pf5b4c36pitbq6ft/lasikujipu.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/dc866756f68028c6d5b89045623f7afb/raxokimafipafodifixuno.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/92930504446.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/a962010bhlceocui9ml7n7c2eb/dokuzusilonijonisulomewu.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/f69l2b63b01ul3324qrkm0pqb7/fepujukatixevefigifowed.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/sidenevatorunu.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/397863524.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/jokizovekabarumolurufosuz.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/96480486385.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/rufapiwifamejepejifuvug.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/jupuzemofivagebebevupuw.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/6eed63f84c3a4fc8844a6357036737fb/sorajowedejivawe.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/ae3503c7ffa304fc52dcaedbe51d58b9/furexosupurozidufigufibi.pdfIn PDF document text
    • 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_off00013c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1