Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d66a7216b02f30…

MALICIOUS

PDF

86.7 KB Created: 2021-10-14 08:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: 9d4af58059e0286717abebcdc0e8af37 SHA-1: b8341bfc1f1ba37826b9ff9b17d105a9d00e7af1 SHA-256: c5d66a7216b02f30bf6a1ee57fa7a88a4c3f6eaa16930c6638bd6705c7a3ae2c
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=funniest+3+letter+words PDF link annotation
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/qfkkoqc89e281j5ck35nblhfqp/vetabufaseveni.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/fisijiwonadiwu.pdfIn PDF document text
    • https://andrejc.si/files/file/mexibuwaponixos.pdfIn PDF document text
    • http://bastola.org/userfiles/file/guxiwodomilufewajafu.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/1ee74eec08612640883c2176d7a54f9d/mefubirugajox.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/pufotokanokenitale.pdfIn PDF document text
    • http://blog-lunettes.top-lunettes.com/userfiles/file/xamujugumibimu.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/dibasowitedodojofub.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/86009791064.pdfIn PDF document text
    • https://viboot.traigiongthuha.com/ckfinder/userfiles/files/4233230418.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ojmjv1sjim36rtidfe505f3i7p/gireruluxutodimurig.pdfIn PDF document text
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/47941412933.pdfIn PDF document text
    • http://schokofontaenen.de/idata/3008082376.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382616e83f0---95771812167.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/64587391625.pdfIn PDF document text
    • https://bayihoki99.com/contents/files/99970390769.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/421453612.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/93483113009.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/foxigebi.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/59415821549.pdfIn PDF document text
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/68209995429.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/savogenawu.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/85983580522.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_off0000eb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AB 19536 bytes
SHA-256: 2c6485348e44c2d7a4248004f09075f7e411fc04f44d7e0c089054b83896050a
font_02_sfnt_off0001360b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1360B 10412 bytes
SHA-256: f18272be1cbfc57caae25230bec08a2c7ab457002eb4c2f6dde13f4b230a89ae