Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba49e1f8b5118e5a…

MALICIOUS

PDF

91.8 KB Created: 2021-07-04 01:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67ee513605aca64767d512f4c4b344a8 SHA-1: 52a4ccdf07e58991eb5a3c060e3760829a741c3d SHA-256: ba49e1f8b5118e5aba23dcf7184d3e5d033b868e1030e230d3911e83672eda7e
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which host other PDF files. This suggests the document is designed to lead users to malicious content through a link farm. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/iu1tr765sgigg133k692agk8ke/zofexolegalusunejared.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608231c790f7c---71162860719.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7e48c148c5---vonefekosobidubejezijido.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add07bde315---sizadamu.pdf
    • http://medica-eg.com/userfiles/file/7718303020.pdf
    • http://samuiluxurytravel.com/Uploads/file/jalilivabuviwowavukox.pdf
    • http://zoop-tech.com/ckfinder/userfiles/files/zofamanoloma.pdf
    • http://malbreil.com/userfiles/file/kadimaturubesedakarij.pdf
    • http://uticachemical.com/files/upload/files/dolaxubotoba.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab04d188a7d---84976795565.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7aa272a5fe---30670147476.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/af4b6d5fbf2d3477ed9dc601d201f636/venawuvovuzefagatijodaro.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6pcobkkgngefb4glvic29ch7a6/funumojimunaxanaboxifuge.pdf
    • https://longhoang.vn/upload/files/lixakal.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/cf3dee266d57e01c002007ba08d2420f/89913422061.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf6c28fd34---50340672880.pdf
    • http://skipjackpoke.com/ckfinder/userfiles/files/15404536438.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9bd238c31---xuriludofebisazizemike.pdf
    • http://marta-galan.com/files/varios/file/bijofaturoxagapif.pdf
    • http://bakkervoorwinde.nl/app/webroot/files/ckeditor_files/files/2313383114.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c0784935019d420c3a3294164c64dacb/gikedovuredevudev.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/0ggmkpv2ah2afvrmndhvck1mft/wisofixawepekigulusuxined.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0357b3e53f8c5aab94e3a0b479366ce3/dudalevigefusutuse.pdf
    • http://pincailight.com/zk/UploadFile/file/2021060418042573499.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/4363afe818a89b9f5a9f3ab7d7ad7947/fimakef.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a6b711e763f8b82c6cdbf40cc6d89568/dugag.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608137ee45e0d---resokadakid.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=what+is+spanish
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A6 16792 bytes
font_01_sfnt_off00011ab8.bin
65d695da88828f33aa9a3838bd6ebe5f6249a800d23115eb46936c8996f713c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB8 19020 bytes
font_02_sfnt_off00014bde.bin
8d6cb1f9dd7eea2f1f64f0cbb6bda831f8d55cf8941085e13472dc15a0903dcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDE 9944 bytes

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