Malicious PDF — malware analysis report

Static analysis result for SHA-256 5219d1875fc3caa4…

MALICIOUS

PDF

86.1 KB Created: 2021-09-02 21:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 76dd147bfd26eccc891a2d48594fb913 SHA-1: 83857737527b5366fc9768478f5b0fafe1b358ff SHA-256: 5219d1875fc3caa466766ddfef6949a219c0302944fa075fac9ffbee1cc36184
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/div7ftummfvk3sfaa737gl6kig/xemanawonomad.pdf In PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072dc4db30f9---bosonazizepimu.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/razer.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/mvfjfg62s2ffo73tdhc0fdlglb/ladewowinolazaxike.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/14717530326.pdfIn PDF document text
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/bunukonowof.pdfIn PDF document text
    • https://scalping.ir/data/files/file/25184583747.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe245cb2a8---12799546777.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/14228fb4535cd5d6a68a030065e0d248/92084182883.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/249d60be1d7a3b07b0e7e0dd1d9e0800/rimejemanefivu.pdfIn PDF document text
    • http://keramann.ru/uploads/files/bufesinakononovimosiz.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/sidoneradepovakobadowes.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/kurofubunibezapawal.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/4421e84827dd099ccd557f398b02a54a/rojuwasapunibema.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/kowilidalelazunafilesi.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/zuvukudani.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/37869733544.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/e30efca51e957c8af7183d7a0e381701/gixikuduw.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a98de3e15cd---11807510761.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/kuvegijamuxa.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e8aedb3fa---15934322569.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/vebigenudida.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/valikebamirarusadiba.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf5885ae75---mosepodofunifabirep.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/jatipakebetoserodat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=programa+de+aprendizajes+clave+primer+grado+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9C 11124 bytes
SHA-256: 559d0cda0acf9ecaca8163d6fa54b941e56262c5f78eb10529332e341a017d91
font_01_sfnt_off0000f64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64F 2052 bytes
SHA-256: e5258f748d854ee194f9bbf130bc06bb832ebb1c1149390068239288061b797e
font_02_sfnt_off0000ffb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB8 19352 bytes
SHA-256: 8013069e262bb62ccb8c421cd2ba77e537a521401ad3bb608b485d1abd8681fd
font_03_sfnt_off0001316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1