Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d83135a4a7c1756…

MALICIOUS

PDF

83.7 KB Created: 2021-08-21 07:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: 2144c02cdcecc5176bcad9d015dd75ad SHA-1: f594789b5cff1d589b9567ac3a5fed59a3b1a8d0 SHA-256: 5d83135a4a7c1756d5889ec2eabd4244158eef9fd29366ab0844022781bf9d3e
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://catamma.ru/uplcv?utm_term=best+olympic+lifting+strength+program PDF link annotation
    • http://101-games.ru/images/uploads/files/ruxujatalesazobijulogez.pdfIn PDF document text
    • http://trinkhorn.org/userfiles/wofotopanuvobaxolumupezag.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9ad7baacb---vepelinetojepujexe.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/vukojeze.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/gurupigepo.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088bca14479e---46034299029.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae45cd5c151---vojazuletegawij.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/831b1b5eeef53e5281096f851f436f43/dugazulevegugofigaw.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/e3bd3f8c6b94f0314c78f156ca2584fd/72607750562.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083ece4cfd1e---xolodajenivofezirez.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/p9bgm01n5si7oln7r0eutnp8h6/71614319691.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dda65ecda92---7649583710.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/vulatebatoravuvefazo.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/92113423887.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/22413856106.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160918aea549eb---zifabepawun.pdfIn PDF document text
    • https://mytopics.it/uploads/file/lekutixofupu.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/33416719838.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/komezajizibivudamesiw.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/62633278248.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/lebuselukipedaxujeripodut.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/vularikojafabanim.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba51b52f7bc---28148606294.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/24864a60b211137397d7ca2d187922d6/xidanapugowopowegil.pdfIn PDF document text
    • 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_off0000e278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE278 16840 bytes
SHA-256: c89c1c7cbfe418949af0ac60c518155ab34b6cb92ccd5733a7aa933b022d2c48
font_01_sfnt_off00010dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFF 11092 bytes
SHA-256: a922b6902ceb35db426ee634426adaf3584ef11fce411d349ad2c306855acbe1
font_02_sfnt_off000127c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1