Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f8e6f05b6e6438…

MALICIOUS

PDF

99.3 KB Created: 2021-06-22 20:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 74db215fade3e3f28771a255ca1c97a6 SHA-1: 97abad365887f1fee030b60c2973ebef189839fc SHA-256: 98f8e6f05b6e6438893d7301fb86846a4cff4909c242475967a95a471a4ef573
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to direct users to download other PDF files, masquerading as 'telegram group link hollywood movies'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting a malicious intent to distribute further malware. While no scripts were directly extracted, the structure and embedded URLs strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076c553d3002---43951861911.pdf In PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d4763319e---81885899358.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/gatagizoronezeluwepejotun.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/telovi.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/97719152646.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/894e88ad266716fe19243afb7dcf1116/39659785870.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5860285e9---mogazuxes.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160903a30c94ec---727334338.pdfIn PDF document text
    • http://noahsmarinesurveyors.ca/userfiles/file/59051636801.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7fe133777---jimitiserowa.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/f27e52f678cab55a8080639a8507aaac/vuxokodakazomakexixamoni.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078437d8f6ff---7520305635.pdfIn PDF document text
    • http://www.ximangsongthao.com.vn/app/webroot/uploads/files/4148587967.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d6d22c77f---36064766027.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/4e10dd939250e0e0e41f488968f60125/57898234931.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070699a28089---ziwoxuzaxoxirav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=telegram+group+link+hollywood+moviesPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D1 4872 bytes
SHA-256: 0bb961770ecdcc022fcbfb889d935e2e61ecfc08138a846819401ab20a103c2e
font_01_sfnt_off000129af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129AF 5640 bytes
SHA-256: 67819037d64579cb48e50d6e42845c6fecf22fa839041c9e5b13508ecf04bdc5
font_02_sfnt_off00013cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCE 13028 bytes
SHA-256: be156b21cd10c79285779b391ed33b4c551fd38d0cb4cae49b6c605ba42bcb88
font_03_sfnt_off00016979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16979 16208 bytes
SHA-256: c691c2dc236ff1c3149f8178f30dcb30456d959af2bd230901b395ad55359d31

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