Malicious PDF — malware analysis report

Static analysis result for SHA-256 28a18d44b32bb23f…

MALICIOUS

PDF

81.2 KB Created: 2021-09-01 12:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: fbe0949901ba73fd7c0165aae96b3304 SHA-1: a578aee3e8e97666276ebae00c729a933cb69136 SHA-256: 28a18d44b32bb23fa38ddd680e101a67cc49961317be0e7ae611165d1cbc2f9a
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 WordPress sites. Heuristics indicate this is a link farm designed to direct users to external content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad84594c67---rakinagakozegofira.pdf In PDF document text
    • http://kmkonsult.cz/userfiles/file/fumikiripaku.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/kuxalabezakebuj.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/31386926922.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/xezolozeditoba.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/2359866261.pdfIn PDF document text
    • https://spacio.hk/attachment/file/vekovalo.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/gigezakarozutavewotifar.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/47133271559.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/puzolavabibokusebolewix.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/vujibamoxid.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ja3bf8kgo5j0j8ako2fhtmkvl4/75188046244.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160fa927f8e2c7---32596124538.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c427968f9---pewanusudogo.pdfIn PDF document text
    • http://quranday.org/userfiles/file/minuzibunotesatejebiro.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/nifomigotofowewafanudepa.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/7269d5c4cef7f27af40492e617100dfe/11669677033.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/69898839754.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/6rl9b3plbohuemtq820dnsr6dg/72148904206.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/totiguriwovixedovuf.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/050f311a7fabefede24426e1d99ef622/6955659540.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d432c44df---gebinurovesolokujuxisiga.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c659fbe3bd0---24058369720.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/vuneluwutonuxenetisu.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/wuletugebodagagalezefuje.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/2951f00d4d7b69ff7500ed2a35bd2d21/94014003988.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=telecode+for+indian+namesPDF 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_off0000d8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B5 10500 bytes
SHA-256: 6e00319663501417031d047dccc6b9926c6af2a2652fb5fa64195d6a2507c0a3
font_01_sfnt_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 18152 bytes
SHA-256: 8b2660997e12ed5aab0d3ea453c89ae63f10195dac990f4e823611156b3e4041
font_02_sfnt_off00011eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.