Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba3349dc74b47a9…

MALICIOUS

PDF

80.0 KB Created: 2021-08-02 08:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 377b5d9c71855df8e849dc23aebb834c SHA-1: 96f88bc70c829cf51ae769e6761ad5640d307b33 SHA-256: 8ba3349dc74b47a9391e985cf129805625c82dbae4794c5ea8481cd6359eba15
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a link farm, directing users to multiple external websites, some of which host further PDF documents. The ClamAV detection indicates it is a known phishing or trojan variant. The presence of multiple links to potentially compromised CMS upload directories suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4740

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://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9e21c913c---luxaxazonanidudupumiti.pdf In PDF document text
    • http://mariopresto.pl/userfiles/file/tepaxan.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/wetukaluwolezubovinemuzu.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ae21b56eb---pijajozixevopevavaxa.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/aad04cd424eb16f553c1a1287738e121/vunarizerixekideliji.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f48a06505---58733155146.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/25312913026.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/vizuzajinatuxalikekap.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d853b2d1eb1---semagazemesowivezedi.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/fnh6tgfihue8ldjnhu5vlf22so/70397594817.pdfIn PDF document text
    • https://suksesunited.com/contents//files/26564072757.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/0gs1k5klsrlgefgtcjtn0e8880/minubataxesijoraxo.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/titinugemufujewe.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c4053b30e---4924210295.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/1b935a31e9e47106f299d08e5c1e3a3f/mejimuxoripolinu.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/dakelowofadanidurexe.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b4bf76c1f---mesoganoja.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/71556201227.pdfIn PDF document text
    • http://954move.com/clients/4890/File/61661623164.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/6ddbaa589d8461eb4b61a0d8e6c67c5b/pofizoresonem.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/60685257914.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/tipulakuxumijur.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c26c1b23252---57893681972.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d09b3bf34---zenidogukiwikabipimipis.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/78764822240.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=super+mario+bros+3+gba+cheats+gamesharkPDF 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_off00010030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11847 11248 bytes
SHA-256: 22a71a9bb4f809d56e6f6b5bc240e2f01726e4c24ded1ae547bcde11f0b7c7c8