Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f48911a6481039…

MALICIOUS

PDF

79.6 KB Created: 2021-09-05 12:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 48700cd8e7ae8f2af1ff55b2da46ca19 SHA-1: 8d2d03e995fa652b1271a8dc367267e5220da377 SHA-256: 02f48911a6481039e82f32646964e2263a91cf7cfb23f248b0efa6a79329758a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm, suggesting a tactic to manipulate search engine results or host malicious content. The embedded JavaScript likely facilitates the redirection to these external sites, contributing to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=percentage+worksheet+for+class+7 PDF link annotation
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/3c39c2354013d3d24e537eb04c0140b0/81006282359.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/gilaja.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/nibamowomufazaxizitolus.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/36dd801f6238606285a539e753e98a94/namab.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160724eb2db3b4---74537399897.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/979d609be938d768a09aaf897feeb035/bifijugin.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/ead74a202f41c02bb77d46eb24a2c39f/jomiluruxunefusivefe.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/c63cb2e34e55c657c9cd15f76d46b176/mivaga.pdfIn PDF document text
    • http://fabtur.ru/upload/files/75547663788.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160855c2fb7df5---66277903982.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/3513d25f033f0cc60fb35d79d62dc025/likiwerewotirazoge.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/f10af644h4u0lgnt0tkakrq0mu/ribab.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/dagaluwuziwopez.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90c4a111a---73846041187.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/45346055410.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b115fbbe5bb93f8394161f9dcc4eb14a/98123789964.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/00b26997bae7cd40eb4070dbad1c7224/rexejawavixefamedagot.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/33355536559.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/88120492503.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/vinukuje.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094bd0f79ff8---77436088814.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/26445415304.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.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_off0000d136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD136 18012 bytes
SHA-256: 28a3631f88e001597ed047c028c8bb3045f42733f1e3f4d37e003d91c9028922
font_01_sfnt_off0000ffe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FB 10752 bytes
SHA-256: dca6b053e4ebe7e676b125803c85b5f89a43d5dd7387b95b739f862f1cb1aa02

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