Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3c94a04029ccfa…

MALICIOUS

PDF

82.8 KB Created: 2021-09-15 18:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7b1cd288075088f57805d77bdfbfacd9 SHA-1: be274c46d790ee4c081074cc8fa88c41d536be35 SHA-256: ea3c94a04029ccfa4b90a425d17ce7a6c7d193bd9576055a5bd710ef1ac5f0b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of multiple external URIs and link farm heuristics supports the conclusion that this document is intended to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41318286009.pdf In PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/09f39051cc6091367d732a480c88ca4d/sejumabuvimixumumegatu.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/fipurixuxasosivum.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/19amra1omuf7h9n4jh3epolm21/xisozuru.pdfIn PDF document text
    • https://www.netcorp.hu/data/editorfile/zizovusapavivuriwexewafif.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/tojuzopalujofutobasawadag.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/dobuwikekivugijelexu.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/29834070943.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331f1f7d391---12470699025.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/60919767903.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/19095721335.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/magefiwesugefegobum.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/5569491748.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/97483621210.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/eaad1f22779f8aad777b16eb54f553d3/jojutozifiles.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16139937bca776---maxugikif.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///mitoruraruma.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/sapolisozomujiwexajipobit.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/widowonemeribelamomoti.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/63338155854.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/72660489034.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/36169902250.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/bogamomojefupijuru.pdfIn PDF document text
    • http://zakuskymoser.cz/www/ckfinder/userfiles/files/ziwiwajudaperis.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/ad220108dae67dce9c5c7ecf88c7a9bf/52833356430.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/17009322637.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/zagijaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=avee+player+new+versionPDF 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_off0000df94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF94 10392 bytes
SHA-256: 34126079230ead24386ae46529f4891db7b2d1f8858814161eb9041e32d89419
font_01_sfnt_off0000f74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F60 17620 bytes
SHA-256: a95728918d708cfa70644cd6336160f05cefca7d59ffdd2f809d31feb5649fd5

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