Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3de9be2a51d7b43…

MALICIOUS

PDF

78.6 KB Created: 2021-09-06 22:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fafec0c0e34ca486d4dc561b4185c721 SHA-1: 9a53fd7abdf5d4ed90870147e63360951275be4a SHA-256: d3de9be2a51d7b43e5548ecfdbb4bcde47c3f8c69dfe411194c66bc88abb48ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and other domains, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a pattern of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/9cef1c22c0b20b5d840d1575a951735b/favowibamitusojesomiwefen.pdf In PDF document text
    • https://hirurgija.me//files/90773249622.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/19398440689.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/4c20b6205088b4e607ee630b6fc8b125/fupubavot.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/vudoweboposinogaza.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/romag.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982f059d2c1---jerem.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/mowaxawigifulewetid.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a328857ecb7---34514508366.pdfIn PDF document text
    • http://hasyo.net/files/file/80525334070.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/7577a4m6i5spmt8elje8ilt021/43739952694.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/69b894d224373b5e70e000d5f99c777f/99321565611.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/44997515623.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210810213712.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991461397ad---14949316416.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/zijegufuxadafusofikura.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/getiteva.pdfIn PDF document text
    • http://allier-genealogie.org/File:/45609016911.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160f77921ee805---xegimefosolajag.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/8e6aae7e031288d76b2a3f2fc799dfa7/marusisex.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/dejuxubetezubexu.pdfIn PDF document text
    • http://hosteleriayvending.com//ckfinder/userfiles/files/70551201369.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/86937940529.pdfIn PDF document text
    • http://from.ua/upload/articles/2021/06/13/files/9551566311.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/2e9c685365f7a5ed83771398c4ed9c8a/23253705031.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=mathematical+signs+and+symbols+pdfPDF 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_off0000cae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F7 11216 bytes
SHA-256: 590f3ef5ded9947ad185c55b53bc03314252f296a46c107fcc60ebc1107ceb71
font_02_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 18472 bytes
SHA-256: c4b3c9818fe5a3a61175e322eb5b5d11de80d87ebe712a7cfd6b896233999168

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