Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7cd21a31881bc6…

MALICIOUS

PDF

68.7 KB Created: 2021-11-10 00:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: 0336d41b9c86ab1415a1ea7167ca67cd SHA-1: 62762f1d2cb9f76adba05ba3a12461f47e471517 SHA-256: cd7cd21a31881bc6945c65900b1a4589871702c9d06852a5b5b42a259512b74e
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://doctmcooper.com/userfiles/files/7123404258.pdf In PDF document text
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/bimafirubeguruw.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1617133245f759---relebiledupajosenolipekoj.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/5456972230.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/wugosaz.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16163c33cb704e---35361134896.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/juvoxebepumejapefaguzor.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/96805790388.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/sotomidanarujaf.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16181bc723361a---34683675079.pdfIn PDF document text
    • https://cserepakcio.hu/xdata/file/6022209399.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/77578662885.pdfIn PDF document text
    • http://hzosm.com/images/upload/File/79880000181.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/53229570140.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/76842150492.pdfIn PDF document text
    • http://odumakus.com/uploads/files/wagejuxi.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/vizadofagema.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/86081989730.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/59046734384.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/87598365308.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/xawavotufeju.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/11010518648.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1618903963eb0c---delejura.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/89718413387.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20211003_032720.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/tgwjJlsMqHc/uplcv?utm_term=shipping+store+near+mePDF 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_off0000a679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA679 17968 bytes
SHA-256: 27a262e79d24c079966a3e9a183cf5bca75a212cac11f483792c65746285d6c9
font_01_sfnt_off0000d536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD536 10728 bytes
SHA-256: 61bb32bb9c88c0ebea71cd01c8fe2ce9dcdc7ee37adb8abea3e882135411289f
font_02_sfnt_off0000edaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAA 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef