Malicious PDF — malware analysis report

Static analysis result for SHA-256 96963d07ec1463ae…

MALICIOUS

PDF

80.8 KB Created: 2021-09-03 02:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 56a5fe43f47054e442d5a5bb6a41d172 SHA-1: 14ceed8e3756ca53ffab8dbc823f5c846c69b4f5 SHA-256: 96963d07ec1463aec4c9d92796e9e805128c93c9f2252ed2f7f5d0c51c74d8bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and potentially compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the sheer volume of URLs suggest an attempt to distribute malicious content or conduct phishing. While no scripts were explicitly extracted, the nature of the URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://inwebjor.ru/uplcv?utm_term=mud+logging+pdf PDF link annotation
    • http://dientrotiendathc.com/media/ftp/file/beseroketizininekaje.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/58950049360.pdfIn PDF document text
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/64412649179.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/95904804265.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/961e6042b951988589fc50f9a6c7b08c/towonefuxoluz.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46276981586.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/55279734205.pdfIn PDF document text
    • https://webmenuplus.com/images/file/pinux.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a571059e3---10325891318.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/6129015835.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a329074f81---sisajotoxa.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/57749375857.pdfIn PDF document text
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/95984249353.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/471220297f32aed050c1dffa958089fe/28261646726.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/wamijekikurijipiforamud.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/86304745961.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/zowekupemekewotaxajufaw.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/fibeberudowukekavarexuj.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/kuruxekogedodoso.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/xuwiza.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e517147fd8---19292409782.pdfIn PDF document text
    • http://apsons.eu/files/file/62819301599.pdfIn PDF document text
    • https://goldmenu.com/userfiles/file/80968953891.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/39531753886.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/71290669361.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/fobamukorekejajodakipa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD966 17612 bytes
SHA-256: fac6893cca0e7891f2078aab4def92be145976b195b994a53b8a272ccd827518
font_01_sfnt_off000106eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EB 10108 bytes
SHA-256: 2ed9f7c6099e46fe04ff19fa6473b8f6e89c08c1c3ec4652227bd7f64a827542
font_02_sfnt_off00011d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1