Malicious PDF — malware analysis report

Static analysis result for SHA-256 574b7b8d18149011…

MALICIOUS

PDF

89.9 KB Created: 2021-09-22 11:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 25ed0f03806ea859aa8bfb9501b77c8c SHA-1: a2de627856c2af8a2f658d5841977c4cffc3c11e SHA-256: 574b7b8d181490117190bef1f86dcebdc136da1484c537d6332f2d5b84af48e4
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains multiple heuristics indicating it is a phishing lure, specifically targeting users with a fake download button and an MFA harvesting pretext. The presence of numerous external URLs, many pointing to compromised or disposable hosting, further supports a malicious intent. Although no scripts were directly extracted, the PDF structure and associated URLs suggest it is designed to lead the user to a malicious site, likely for credential theft or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=moviebox+pro+apk+ios PDF link annotation
    • https://faktxeber.ru/resimler/files/pemejukobew.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/wifekafebusetuwumed.pdfIn PDF document text
    • https://phr4u.com/files/xuziwozopirubenisitetez.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/xededomezezadovimazojite.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/tesagezewekerokotedab.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/15510641459.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/mavenametazabe.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/dadumupumuv.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614286b123683---dabopowugetobozakepu.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/d5a6a981d95a0acd51c8003245f6ac53/bovuvomikevibudefe.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/sadovudegilabif.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/xowetojipizetavop.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/xamaduvasezujixow.pdfIn PDF document text
    • https://sma-dfgg.org/site/admin/file/77039610722.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/zowesiwumovilodep.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia/files/69870392693.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/vixapuwop.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/8d969438bb54b3be94c76efabb2bd958/23088734851.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/65651589850.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/nuwijavofuni.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/lamibubujurofolabewagudim.pdfIn PDF document text
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/fejemokakuxevadaboruwebid.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_off0000f903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF903 10392 bytes
SHA-256: 38bedccf9b4bc0f3cee02938f13c16e750a6dfb1efcf5305ade5a91a0bf2e699
font_01_sfnt_off0001107d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107D 19140 bytes
SHA-256: 7daf7e09b2beafaeeb9f398f350765563385d86aa2c1a423c5016ea9866dd5a6
font_02_sfnt_off00014205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14205 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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