Malicious PDF — malware analysis report

Static analysis result for SHA-256 4784de05da2437f9…

MALICIOUS

PDF

74.9 KB Created: 2021-09-11 09:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-20
MD5: 4c592b8e419ab1294c43e05bb16fdbe3 SHA-1: a4895c229705dcc786a93f418b0fe92580ac1e97 SHA-256: 4784de05da2437f97d5b03686041ac848fd408732ce2e70c81d14afc2f391aa1
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=the+57+bus+free+pdf PDF link annotation
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/11530513029.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/87926166791.pdfIn PDF document text
    • http://podarox.ru/public/files/98161094806.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/murupuvarekorope.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16138b0b6f32ce---62037312906.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-02/images/files/83247493463.pdfIn PDF document text
    • https://sergeca.com.ve/ckfinder/userfiles/files/97430587185.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/ef9358784cebe5e4f9790e48c0af0b1f/66884005184.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312d50d3f6b---xiwifagu.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/25428368603.pdfIn PDF document text
    • http://gloteckr.com/upload/editor/file/vefodupufipe.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/58911148498.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/65132176292.pdfIn PDF document text
    • https://computerzone.pk/file/polijawunosixazilepe.pdfIn PDF document text
    • http://synhbio.com/upload/files/73673300823.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/46383232148.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/fejutaligitakabewatareri.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_off0000c337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC337 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB49 17052 bytes
SHA-256: 48ace84606e24b8609622c738163610e7d251a14b03249ba3adee91eedcb7c4d
font_02_sfnt_off0001076e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076E 10360 bytes
SHA-256: 60d86434abc7cc9d33de42ef4c4a788ac4b19af12a28112596ceddfd79c8b361

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