Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e625952fc029aae…

MALICIOUS

PDF

114.2 KB Created: 2021-07-24 04:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 86e17253a72dfb9b264d94ac886985a1 SHA-1: 3b3f3ecc06e97da79c5225007df9b8d511c7dbda SHA-256: 6e625952fc029aae4e7af5d0011376a5ba447958d608de2d3acbdec81bc962eb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm designed to redirect users to various compromised WordPress sites. These sites host further PDF files, suggesting a multi-stage download or redirection scheme. The ML classifier strongly indicates malicious intent, and the presence of numerous links on disposable or compromised hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 5

  • 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://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/19a7f192bcbd99e404922f8c6eada720/dududaboradi.pdf In PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/5f25a6eeffd530ca75ab6646e54f7f99/42552054179.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160be61ac54e8a---noxupakavulunafapul.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/1bfc197f09e2e08796fb8f29614b058c/54958732321.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079fda69729b---13100092813.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607203c46fc7f---65995938093.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a670cbc6e0e---78942610836.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/69795931047.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/wuvikizeteropiga.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c96add1c4---65201317769.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160af8e6284f36---79623694919.pdfIn PDF document text
    • http://stroi-sistema.ru/img/48008361089.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/40700689897.pdfIn PDF document text
    • http://wirheiraten.de/images/file/31910218149.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/66809231447.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/jfkj0f3thas49ft0ukjgvrgops/fusodezefamotakimu.pdfIn PDF document text
    • https://hurtowniaroza.pl/upload/files/xizikuxorudaxerejuxobaba.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69cddb037a---zenowetirumejubevew.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f6a591d99---lekobagivedu.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/3b6e9500703ea0799b5bdc35d8dcfb36/mipawokusezoz.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/cb105b4510b2936cb5422604f5333ecf/46279086182.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///vezanevulexagilere.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/dc3ppusbr11jnlin49a9b65kd4/sovakokivejov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=pagina+para+descargar+documentos+de+monografias+plusPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFF 19556 bytes
SHA-256: 7aaf16df80dc892db6a4abbd3c05356f3f710c687a5da6757eefd8c15ccbe2c3
font_01_sfnt_off000171bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171BF 11064 bytes
SHA-256: 1801f6e199cf3a3f8a3129d4e356e9482a592d6a95aa0d4d6733dbfa66d385a8
font_02_sfnt_off00018b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001a368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A368 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae

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