Malicious PDF — malware analysis report

Static analysis result for SHA-256 3571fe890cf9a657…

MALICIOUS

PDF

77.3 KB Created: 2021-09-19 15:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0ebbd9764716a3dfb12499c2a6e4cbad SHA-1: eb94c4b630db2d79de489c752392fd9dc48db16d SHA-256: 3571fe890cf9a65738d02277133dc4d3f55ad0e990000e8db88afda19bc3820c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging the 'farming simulator' lure in one of the URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://pixomot.ru/uplcv?utm_term=farming+simulator+18+mod+download PDF link annotation
    • http://inruho.ru/ckfinder/userfiles/files/zanuvudamagiderigulaga.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/95049777965.pdfIn PDF document text
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/14404168822.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/69152104888.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/76873926542.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/53188809268.pdfIn PDF document text
    • http://poorclarescork.ie/images/9814678213.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/towifetatavapogoja.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16144391a2d5e4---ledemopidimus.pdfIn PDF document text
    • https://yuktogel.com/contents/files/buxefifelufi.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613e93bd0871d---wuropofow.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/rusepebugulagexenodul.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/nomesabodunopamur.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/barajuvowubamidir.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/kizixifug.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/siletazezox.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/344856665.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/fafin.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec4ec7a983---pepilijebezemo.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/dorobifunezuxap.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/78414e0b467c9615078e2e8043e73384/7629814516.pdfIn PDF document text
    • https://alhasooncorp.com/Files/files/9067322351.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/97601041322.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/novetixijono.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_off0000c8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F6 10884 bytes
SHA-256: 162c20d4dc234507bed153f0d8a0def7393033967b59a03e7714e1965bdb862a
font_01_sfnt_off0000e1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA09 17512 bytes
SHA-256: a9c71d1974565fc0aa63ba9b6d487e4234560960abcd51e261339634a2a4baaf

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