Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d77d7018993efa…

MALICIOUS

PDF

93.5 KB Created: 2021-06-27 08:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: 5498d762e04f3e926a6301fb333b8bb7 SHA-1: bf76ce57600455b4ef77ede86260364b9ce49fb9 SHA-256: c5d77d7018993efaae34a5fa6832ff2302fe647acd5c2d4e3b186100fd8f9342
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://rilta.net/userfiles/files/zaviwoxik.pdf In PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad2a2d0b56---wumikekesazise.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d44686354aa---27787542584.pdfIn PDF document text
    • https://kermanrooz.com/img/files/zakelefatezonekefibun.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/29774018972.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/88952904249.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/a8029566fa536ef32dee7b2577f8f715/sumevofofofo.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16085b0d9ba55e---58336016479.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/bd4ma8p4lfgl4quuu9o1qsb5u9/70443475211.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/51385b7f13fd9f7220f9301b1fc1a3d1/32432389965.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/nuruzepotogawotufusebiv.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/134904406.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/4815948b9473575b28b0b952584791a9/40932259031.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/p84l5hbirqism7u0vslmri9o27/wibus.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/kuxawomuguzaje.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/732e0034685c6362b5a12c0bc4cf04f7/xuzozosikavuborin.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/37569051755.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/99691410460.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/73703584361.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160b04ea178171---wupogi.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943c583893c---61489971391.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/72491642249.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/26813851623.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=fire+belly+toadPDF 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_off00010d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5C 16652 bytes
SHA-256: d3928d8e8690ce6d7929c19586c06962155e6cbc04a353544a17ba548eafc7dd
font_01_sfnt_off000138a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000150c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150C0 10200 bytes
SHA-256: e0f3adfabb6557feda4167f5409ccc0815ed0a4ebff43de09882f88a9424201f