Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ef0b3f460ff964…

MALICIOUS

PDF

81.3 KB Created: 2021-09-18 11:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-20
MD5: c27f8c37e2f69d7a647e740061babd48 SHA-1: 489d7bcf8fce092ecee02289879b76ccfe996acd SHA-256: d3ef0b3f460ff9643bd91d8f8c0134dcb0fea7726a1d1b28e9770218bcb30799
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://krisoc.ru/uplcv?utm_term=how+to+set+a+timer+in+android+studio PDF link annotation
    • https://ladymamashop.com/uploads/files/202109051612339431.pdfIn PDF document text
    • https://zzhqhi.com/d/files/wivunokaditozapovero.pdfIn PDF document text
    • https://value.ae/userfiles/file/rovor.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/nowixukevizijomuw.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/37001916008.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/1078159028.pdfIn PDF document text
    • http://remobudostol.pl/pliki/konokojizusekus.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc554f10bb---dagimokopotales.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/26430413905.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/43721996315.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/9534180780.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/wotebobidekuraw.pdfIn PDF document text
    • http://michelschuurmans.nl/images/uploads/file/vutujalugum.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/16626074421.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/fibamupizukatigew.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/14372279093.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137df7e04682---11610043205.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/rujofi.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/jebulaxumopabarafe.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210910031453.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/7ff31354799a40dba8675b195b592cc1/fiwuxarakozezozebo.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/mitinemawej.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/59008678610.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/30922798635.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.netReferenced by PDF JavaScript
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseReferenced by PDF JavaScript

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD422 19092 bytes
SHA-256: 10998e489bb2b6f94da7a261cdbde4c43a3be7ab9f61f1c0efdf8b68188efeef
font_01_sfnt_off00010586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10586 10540 bytes
SHA-256: df29511d0188f71269100fd9c54e5cbf9f0a67090911e9316655978c789aba70
font_02_sfnt_off00011d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1