Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09e0e13388b45c9…

MALICIOUS

PDF

70.7 KB Created: 2021-08-10 21:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 5525202d6637243a6cbe2b6a05f41bb0 SHA-1: 416d5a847445b1b2207b5dd5161c174d59decba6 SHA-256: d09e0e13388b45c9c424a68ab8d4d02018ab7cc7813bd3ed11a4126d11858e7a
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 0.7704

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://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160839e153d47d---71863247485.pdf In PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083fe2dd63b5---ragat.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95cf004c95---1487914366.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/19087206527.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/60548433546.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/karopivanuvapewixideb.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087c2fe0ff23---gixonepilodutibo.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/ba851765ae6f484a472f24c9eea86fcf/70298583964.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/75662634167.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/zixubur.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d08cc2fb3a---99119231411.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/19068402143.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/e4fee10fd7acafd4f08ea7cb4c718af6/3161010582.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc21c97be9c---megen.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/a7f8e79f462598c176d76468c41e6c1f/26789630168.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/81931315344.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fab32b1bb---gaxutotekugovamokoruvafit.pdfIn PDF document text
    • http://cpils.com/userfiles/file/fasopulefelamitovenejufuz.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/wumebijegododutexa.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/8f4f5d7ed10cf5011ebddd1f32bfd895/rolinuxejefekagub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=financial+accounting+libby+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC52 10724 bytes
SHA-256: 3eab0de18e4cee9de7da3e2ec98636c7d2552e8c5375dca8f9c2b256ff5aa02a
font_01_sfnt_off0000e4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A5 16748 bytes
SHA-256: 4d78a01de546031399858cc461cd2e049d9908cedc3035fb712e7121a99908d1

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