Malicious PDF — malware analysis report

Static analysis result for SHA-256 293907d47909221b…

MALICIOUS

PDF

87.8 KB Created: 2021-07-14 09:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cace33412a68fd3d5e4347e22f61ffdc SHA-1: df0f7ed5cd03350664eecce4fce0e13e37db3fa5 SHA-256: 293907d47909221bdf7f1d72bd686ccf76eec161caad23d8903c16269ce36a8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, many hosted on compromised WordPress sites. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM firings strongly suggests the document's primary purpose is to redirect users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://queure.ru/uplcv?utm_term=city+hall+inspection+department
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/68490487aa054a3501687f6bb95de2bf/terirarulajeden.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a90b94943---levajenigital.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/2e1e4267c7839aa2db8f2a7a5e53a7b8/gexakunivota.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083a5e0dc5f0---93068098157.pdf
    • http://daedukgs.com/admin/fckeditor/data/file/20210604015918.pdf
    • https://parkettworld.com/upload/files/zavokosotikarunopoxutopu.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/606a88b117e9ae82dd886b51499dbc78/12388261720.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/3e84b426a0a7dec0f12cd75484b0137f/mejelipowoloru.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed69a9e341---zezudobafexefibawivel.pdf
    • http://amctop.com/board_data/editor_img/file/202106101614.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160edb1f1c616d---91965010153.pdf
    • https://alrukn.co/userfiles/files/43048740727.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0adebbd45---segitifudugoza.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ce3c897b3---51157460120.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160703baa95c09---kapuwe.pdf
    • http://staceyasp.com/UserFiles/file/puzubimagunalefusimib.pdf
    • http://sieuthicayxanh.vn/webroot/img/files/dusepalovafukutebasulalo.pdf
    • http://aucoindeshalles.fr/menu/file/9019936414.pdf
    • http://mnwebdesign.dk/userfiles/file/jurame.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/6825813fc8aeed8025aed77a14113037/46752855670.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7b4201b3---lepipowadug.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/14b0096e3104c3fceedf065204023458/13902340571.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/184bd21baa76d242f86a6b244458fc52/97840309066.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/umu3rhfrfjlc37bp7vbt559jdh/49920550640.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160814c95c1798---fanowavogun.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 16792 bytes
font_01_sfnt_off000109f6.bin
681aa5907921fb2af3822b8f7a770377f4e6e65e1705bef4baa3475a696b813f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109F6 17944 bytes
font_02_sfnt_off000138e7.bin
5cf5e1129b665149b498478c79b93b2784036d3ef1f9f0642944be358cc3c89a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138E7 10924 bytes

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