Malicious PDF — malware analysis report

Static analysis result for SHA-256 7884019a87145953…

MALICIOUS

PDF

93.7 KB Created: 2021-07-03 00:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 97f9b2ef7dd19e75751cb1d2d1002fdd SHA-1: 9dc21be0e7fe6861162ff7ac3f6d9da42d1ca589 SHA-256: 7884019a87145953acd432dc520f40d32dec60335044cb6c1394e1d96e2ab360
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the presence of a link farm and the overall structure suggest an attempt to redirect users to malicious content, potentially a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://say-international.eu/userfiles/file/xinosixapotadiboma.pdf In PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/5b0046021df4e515786b90c835b04c81/64244780316.pdfIn PDF document text
    • http://moristas.com/userfiles/files/munatulakojolawofi.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160734cfd86a96---55434978783.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebcc5991d6---vigapufuwigubife.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/23431274250.pdfIn PDF document text
    • http://amandamaitland.com/images/file/45245983037.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/ffbef4200ccb6cdaa3f455cf2f42b4c1/negag.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/pedoja.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/300219lo85gecscslp5fjeabkt/26610167575.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/e47df2806a85c3b0adf59216d2d2a3f8/sanubasazinuxudurevixosi.pdfIn PDF document text
    • https://agatanorek.com/files/file/dijimufoko.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/60768042733.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/bc485314372ac25972d55ccb1b9d02c1/sategura.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/sobofisurijuso.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/11217006426.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1609e98d798a50---gapopo.pdfIn PDF document text
    • http://rsst77.ru/upload/files/39643449779.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/wovukuvoziwexutaxazuzof.pdfIn PDF document text
    • https://clinicscrm.com/img/files/19730166696.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adae187c0b8---80182644167.pdfIn PDF document text
    • http://proxima-design.cz/files/file/talejixonag.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083bfae370c7---womasumepixaxikuwatupevul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=meaning+of+impressionism+in+musicPDF 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_off000107b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC7 18872 bytes
SHA-256: eab44f1f7a0782211e03da78bc98a99f2194660b8d3e2d0b4751240b55962458
font_02_sfnt_off000150e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E9 10772 bytes
SHA-256: f906aad868b3cbbf0b9ac25d2418c9d11c5b8bf94fcecee7b595059c77b792c5

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