Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3279f21a3ffe30…

MALICIOUS

PDF

72.0 KB Created: 2021-09-26 21:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f98048624877a1be7c263ce2a31e4b6f SHA-1: 3f83ef2cd6c6459bae9b55dd83d7d2e7e3682a5d SHA-256: ba3279f21a3ffe30e1f5d8c85052cd83db4ec76cbe6b9f16efd1a56b19137b66
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, indicating it functions as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is for malicious purposes, likely phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the primary attack pattern involves directing users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=rick+and+morty+live+wallpaper PDF link annotation
    • http://scvumaichiramen.com/uploads/files/15923788831.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/87666867232.pdfIn PDF document text
    • http://instalace-charvat.cz/userfiles/file/41849888776.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614779e89b277---18699438542.pdfIn PDF document text
    • http://carywinslowlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41867892892.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/pepogaxunas.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/98086322800.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/28038184975.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/64348320743.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/86741295239.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/42550583910.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/51796443632.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/37238041599.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/parixanatokumalo.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/19412841735.pdfIn PDF document text
    • http://gurukripapublicschool.org/userfiles/file/lawago.pdfIn PDF document text
    • http://baove24h.org/upload/files/35413083333.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/32514262662.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/fexuxij.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/4910503837.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/jojitipusitafoxol.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/76268789114.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/6e3966e82bc74b93973315c54b044d86/95761351500.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/33404940340.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_off0000b282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB282 10908 bytes
SHA-256: 082ba96ce8e3aaf867c1ddad31b35b89d6d93cad767897818adcc4da224173e6
font_01_sfnt_off0000cbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCF 18276 bytes
SHA-256: 4d1854ce619ed6c65de5c02e2fa93d4473426606f2d2774e08c4c2e80ef80f9e
font_02_sfnt_off0000fa89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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