Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b4175f1bc0d631…

MALICIOUS

PDF

107.4 KB Created: 2021-08-06 10:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: 498998cf4cd36659f2249ab8a2207a15 SHA-1: 5609e3b2a2a5a2cb71b26ad0b54872d924a4888f SHA-256: 72b4175f1bc0d631b8ee2a2b2aa311384e583f26384bbb987c19aac38128df06
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://queure.ru/uplcv?utm_term=libro+complementario+escuela+sab%C3%A1tica+cuarto+trimestre+2020+pdf PDF link annotation
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0379f31f85---79113407828.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdd88f2219---61077817167.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/nururuvuxovaterenalupekov.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/bukeju.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/fd2bb4cd3dc1245122d2867d2903e857/duxuzuwijezari.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/zugivozojalusojavadowez.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/11736428715.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/2e1442236f31a8b74fc0c76ac453009d/gonozuzozukuvej.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/26333025008.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/69655218239.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/19066445636.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/37ojbhvrf5p3a5e2213u7nmufm/pamudove.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/61479250024.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/5357329327.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/rk9nmu735hnpg7hddfemf0el56/35331979288.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/ql11ivqhcc1d8siaravf42e0vt/midetisirefigumutepopa.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/26054663704.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/95676295270.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/15850127385.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/4331b5b422871235cf10aff9f4828bb1/pobafejamiletifavowigod.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/88842888797.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160dce8d6bbfa1---67393007392.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123ED 18332 bytes
SHA-256: 088e950e5111f022c628ebc499ce11f4465dea61a38f8fceab6475d6d33af4e4
font_01_sfnt_off000152d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D4 16224 bytes
SHA-256: da79484a7f94e028a8871d907a282bdc2df095dfef79f7b1f2af1efeeab75da7
font_02_sfnt_off0001687a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1687A 11400 bytes
SHA-256: 701ae2a0a1a0259ce8922e4d7880c20c116f22b329d2a62f7947ee5f6eba025a
font_03_sfnt_off000182c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1