Malicious PDF — malware analysis report

Static analysis result for SHA-256 453afd47dcae6afb…

MALICIOUS

PDF

86.2 KB Created: 2021-07-07 06:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cb4fe581d113c7887b5046e78de7ddc3 SHA-1: 0c5ca47c1f21a7e85483c166c27da9208beef06b SHA-256: 453afd47dcae6afbe4141104a6f0ec09f800c80f122f15e4708a518f22c2573f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/a7185a4e40730b057f7411890e0cb1d4/65625073737.pdf In PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aabc46682e7---kobifokofetesofuposazo.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/nadegupugawevuvag.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/9ebqtq1uj9gas0mvelqng2vjdl/xosiwurisa.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/r6u1qum8hvi1jl41ic1bg7ng2u/16549568808.pdfIn PDF document text
    • http://abnicum.com/files/file/xinegilaxezutafudulepi.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/a360b5d177a107a6aec34bc6496d04cb/futepoduludexotavozodinar.pdfIn PDF document text
    • http://safetypath.net/cms_images/76041049386.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/13494870971.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ac566f897---dawowowivesapefenujom.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/as0iih9blvtv78751ced1521p5/nixutixisogofonipisupi.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/55946737558.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/7a46bf443dd3952a5f0593722f340a81/95604272735.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089838729845---mokubifomusef.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/xawikutoreliwurajos.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f382fefd89---4165191000.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/jofed.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/85026335516.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/gewodojemif.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/nilurawagemowijofe.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2cb7ef640---12874570366.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/85529814851.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081493d6f52e---sanatagozotafa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=gta+5+fire+station+location+mapPDF 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_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10537 10812 bytes
SHA-256: 76fa396aaf3b584bceed40cff1382aafcc5b1065697abc4637e7a0a0b1ed2e77
font_02_sfnt_off00011e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2F 17668 bytes
SHA-256: 3da1c781f0e09c25b4ccfd947cbfaa3e0d222271ca61df0f5e701c24009b5adb

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