Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7a1d0adfd0a076…

MALICIOUS

PDF

82.6 KB Created: 2021-09-12 15:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: 14d95888ff8974666d12344135f58858 SHA-1: f1540e593b1d9325a694ea78beb821818b969665 SHA-256: cd7a1d0adfd0a07694f8e5e1ea02c436292c4c1a39953f4fb007f96054786514
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=dark+mode+chrome+web PDF link annotation
    • http://oecschool.com/userfiles/file/42125012973.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/kexir.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/2d645cd4f5d3f7015576420065addddd/rosik.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/zolenap.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/73022319461.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1b730a7c9---lasojazobuwunudati.pdfIn PDF document text
    • http://didula.ru/img/file/77570435084.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/36642884540.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ui15008keiu61vagh3p0016ldj/sezigemuvumowudanen.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/62925138240.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/51188231521.pdfIn PDF document text
    • http://i-dron.cz/data/file/91741911424.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326da09d603---jelesadirawipiw.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/esdnbo6dkn9jpud5e9iv8aoa1t/3316311288.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/gonuwuwu.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/faviligi.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/mililolegurapiwo.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/jiwipiferezoliwefizoz.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ba731ac1d---50618617092.pdfIn PDF document text
    • http://belv.ru/userfiles/file/wuxuxuseritezotako.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/zubolezajaxedu.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/87034770876.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/gikogunetijotak.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/17005640234.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_off0000dd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5F 18372 bytes
SHA-256: 03e1e3fbfbafedc951bc80cf58048b2cf5391aba37d6bf11431cd19d069d069a
font_01_sfnt_off00010cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDE 10448 bytes
SHA-256: f69752ba28b1ef080a87942a54f23e1a3ae71618bc5ded0e7ceaa3c9ccdab9f9
font_02_sfnt_off00012495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12495 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1