Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba75b195590f8588…

MALICIOUS

PDF

93.8 KB Created: 2021-06-30 01:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5e9311a36539de19d883619f919a2eb8 SHA-1: 66971bb68e688a0562e7d26f43a64cd58d8e71b9 SHA-256: ba75b195590f8588261f2c37aa02d77d1fb7bfb157d85c1365bfd0c82b1fb476
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://vsetinrally.cz/userfiles/file/mokagoketaw.pdf In PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/77dc47290e1daddc9e20f1c839bfd6bf/15202748424.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/li8i74emr2v7rmgtgp4slatbpu/favivosomagunepanaraka.pdfIn PDF document text
    • http://lelit.nl/app/webroot/files/userfiles/files/97912553431.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/jumokufanaketuwijeli.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/70d958e817e198faa4b4fa130f120d8d/bumav.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/577j7hfdgnkrc5ajuuetk76k05/35520192350.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/0c1966168c9846c780d11c179ad12204/29542398580.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/48494546347.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/2b21830b18ceb4eab04532a360547d5e/napugewutogogekuva.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/h2gtsl4e8eoma4h5kvm038cbp1/zamogasesafuvuzub.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9f7d76390---derosisizipisuwodurex.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f683b7cf7f---2087986482.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/37c3a70243072caece6a6996cc483e4f/51414922681.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940af14dc13---nobafedixadesanuk.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/56e7bcb8421dc0c295b16b64868e2a3b/97917180026.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3abb56c17e---37198547613.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/c4bf284899fc42518c55f080a55f3715/luzamudanofu.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/tikawezafosurilut.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/b63fdb5ba72e7634f2a12bf1709404ac/fuzodabuxemaroside.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/l2h1d31i0gbp06o0sq3c1cme7u/pofufozexugaragaven.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/daroguva.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/ejaeh67c7iic3l6iacuu7pp953/borot.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/60722901423.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=6th+text+book+pdf+downloadPDF 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_off00010be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE7 10724 bytes
SHA-256: 09dce7dafaeab1e3d4a6beedac4e5a7bdad8511446c23ae77cf213071a512218
font_01_sfnt_off0001245d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245D 17480 bytes
SHA-256: df24bfcdfae0402f25ccbdca95b0c7f91cc8b3860996c7fa2ea0d7e010d379f2
font_02_sfnt_off0001522c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1522C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1