Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b036026fd05a7de…

MALICIOUS

PDF

100.6 KB Created: 2021-07-02 03:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cb5ca5b3197c983670c623294426cf7b SHA-1: 2c3a1c9e0f23037d6acc40012551e01610c00998 SHA-256: 3b036026fd05a7de728301c024a1e637f41007d38aed032da9a0e0a7351a34cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malicious content delivery mechanism. It functions as a link farm, directing users to various external websites, many of which are hosted on compromised WordPress installations or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users into downloading further malware or engaging in fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • 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
  • 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://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ki6ovaveo834jp8bvmotsrlpfm/48494551484.pdf In PDF document text
    • http://indel.sk/userfiles/file/vaxuwudovutukomupala.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ce922f01e---nonipaganif.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/gomokugivu.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/48761f18ddd37bb91debca47147b20cb/73889790773.pdfIn PDF document text
    • http://slanfusa.org/clients/47225/File/votesadakajepesebisat.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/wawokezutovarezetejufen.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cec40ea5227---98586341429.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609467de458b1---90343316961.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805064460a1---gajufadadolidi.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607843ac5fdb0---69878058923.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/sugigupunigogisazefov.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a389f0f1f79---24362040142.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/01db66ef6a10c65a6d2ebf52d7f4fbc8/xipofipovigupelo.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/pq30eidgsmt6u22s0a2ni890m4/15011990973.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/qsep5so8r9t2bvj0pboqp3u5cv/lemixuzizigivol.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/81696704223.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/m7f7hj6i4joqhjhu7hv7u69jms/furureb.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/39631a2dc268246f67acb62c79ce46c0/xevikakixepobekijejuz.pdfIn PDF document text
    • http://nccutrackandfieldnation.com/clients/2/2c/2cea5a7e730406ee40dfbbde6098010c/File/43019533572.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/xekejupuduwapotugebagoka.pdfIn PDF document text
    • http://talleresjpg.es/img/file/tomujefozejebazog.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d72a9183e5---37458177418.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/55304361581.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=wow+classic+warrior+tanking+guidePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B3 10816 bytes
SHA-256: 64514bc1465c07849370568b184efc0bf34d1c930bc94404b11fd3410dcf425b
font_01_sfnt_off00013da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA5 17588 bytes
SHA-256: b23b326d8561ad214a778a9abb06d4fa3bfa5e6604d77c7fbc518d8a83f4d068
font_02_sfnt_off00016b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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