Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22cc6c12cf7bf6d…

MALICIOUS

PDF

69.3 KB Created: 2021-09-09 11:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: b39f14d738757abb11a5a072ed049712 SHA-1: 52ff91ad0972176e599313885c82493cd3932a7f SHA-256: e22cc6c12cf7bf6d42290b09224b6ea309a0d497d443108366f7bc6c1ea262e4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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 http://toyotarent.kr/FileData/ckfinder/files/20210904_E45EFD7B18BBB58F.pdf In PDF document text
    • https://embassyinvietnam.com/webroot/img/files/84489166603.pdfIn PDF document text
    • http://borneneskontor-landsforening.dk/userfiles/file/nepiwujitozutuk.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/mutidevowad.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/mukese.pdfIn PDF document text
    • http://lecostationery.com/files/file/wutalojusawu.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/6831635060.pdfIn PDF document text
    • https://wilocom.ro/ckfinder/userfiles/files/10248760289.pdfIn PDF document text
    • https://zzwgjx.com/d/files/gifeb.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/42706328073.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/tijapuzofizanosapila.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/liwilasibojenemolezusuw.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/divifegokitosuseri.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/gofumedezufulemaloneze.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/xekodizo.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/19289387360.pdfIn PDF document text
    • http://ximangsongthao.com.vn/app/webroot/uploads/files/96778255509.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/putolowexigov.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/49483078064.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/depopufimibufotim.pdfIn PDF document text
    • https://csodamalom.hu/files/files/vunatajakilomowapas.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364afb1faf3---muramerunebijo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=linda+doctor+whoPDF 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_off0000b2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C5 10164 bytes
SHA-256: 6f2bf1302f13b24c33639021c0673cecaac4c4ebe9fd9c241b06fa3546d6d5d2
font_01_sfnt_off0000c96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96E 15348 bytes
SHA-256: 8b67bb0243abfc9bcb99e8aa03e28983a40b89013344bc45fe6eca869538adef
font_02_sfnt_off0000f058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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