Malicious PDF — malware analysis report

Static analysis result for SHA-256 7828926a50f85e4c…

MALICIOUS

PDF

86.9 KB Created: 2021-10-15 02:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 41c663d815e38be32f2b8757b3df5334 SHA-1: d4bfbc96cd41be7f8b3032831d56c3ff6a1c9b5a SHA-256: 7828926a50f85e4cac686e064e0895717317b9e6b3f9ca60cd3232670083dc49
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://accesoriosalmayor.com/images/userfiles/file/89687492900.pdf In PDF document text
    • https://butyfarm.mm520.net/userfiles/files/jixusi.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613c02b6ce126---pesotavobuzusuwenim.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/10/202110090150587798.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/radumopideviwajolixixize.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/tawulevezozofogijuden.pdfIn PDF document text
    • http://vanhacollection.com/images/files/74239050573.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/18891564622.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/zilonuwano.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1615bbd82d41e5---tozapiz.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615fe6e849964---zurijeporalinip.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/36343373956.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/vitibarurivule.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/73286688963.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/30126610533.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/jewovofejikavuxaven.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/zerin.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/geditimufab.pdfIn PDF document text
    • http://nwmanagement.ru/generic/uploaded/file/11040920374.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/19823589582.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/2550654899.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/13393626412.pdfIn PDF document text
    • http://unsersohn.ch/images/file/28826405140.pdfIn PDF document text
    • http://haliburtonhighlandsheritage.ca/userfiles/file/30364086444.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/gojag.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/vItLtdF7Pec/uplcv?utm_term=can+dehydration+cause+low+pulsePDF 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_off0000ef70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10782 17828 bytes
SHA-256: 5f05ac0f6b229f03479b18ecbcec77b1ef07135fc043e7dafc0f535384581815
font_02_sfnt_off0001344d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344D 10940 bytes
SHA-256: 174457975c7237921964d5123e65eccfec31376f39b993b431e6c44576d4fbc7