Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be5fa0b880dd68e…

MALICIOUS

PDF

86.0 KB Created: 2021-09-19 09:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b1c8488bfe8e37481f14a2000be68959 SHA-1: fecb72670a9705d83a9828072b6aa7b6090bd63b SHA-256: 6be5fa0b880dd68ed628c03e8cb742081f5d2b3c659b95fd6183a92fe72824e5
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URLs, some of which point to compromised CMS upload storage. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing a browser extension or update. This is a common social-engineering tactic to facilitate credential theft or malware installation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://euforbiabulgaria.gbinvest.net/uploads/pages/files/nomepema.pdf In PDF document text
    • http://1night2day.com/UserFiles/file/12572199552.pdfIn PDF document text
    • http://metabolit.ru/files/file/42414819882.pdfIn PDF document text
    • http://rayanchem.com/d/files/sogowamofafevipo.pdfIn PDF document text
    • http://miryangpension.com/FileData/ckfinder/files/20210914_9247A70E43881139.pdfIn PDF document text
    • https://aedwea.com/upload/foto/5935725766.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161386e976560e---rawekuwuzulopegu.pdfIn PDF document text
    • https://artbynela.com/uploads/file/25747717622.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/tulasimokenug.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/c0b82a8b90c19ddd4f50c4b948fcf351/bazulizavikabomisul.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/5b236ec0675216dab9fa5fccaa9ec607/dadelesakuxisuregasal.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/66090182999.pdfIn PDF document text
    • http://www.bash.cl/media/file/radigedewim.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/87215844560.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/gowamisakejubadoxonasiron.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/fiximejitutososijejisefi.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/45303055823.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/3fe577fe0ce7a75388b9629eec51724c/sojalonesojol.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/5c975ecbd41c6a751951ad1e4332f753/51346330294.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/60266027287.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/tojokipofexiramilezomef.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/s5pbvk8mte8rerj8ddv8s55o17/joxilivukibunulosejipo.pdfIn PDF document text
    • http://ver9ctrl.sonikgps.com/ckfinder/userfiles/files/80946267521.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/98457983826.pdfIn PDF document text
    • http://gespk.com/userfiles/file/12483519255.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=the+amulet+of+samarkand+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98C 1872 bytes
SHA-256: 79be395588af96fa5df472893822587051e439780fb3f760348c77be68f22830
font_02_sfnt_off00010242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10242 10828 bytes
SHA-256: 1392abca94f602fd4b716ccc030619a9da5438472f459437d3bfbd317e9836a6
font_03_sfnt_off00011b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0F 17848 bytes
SHA-256: c466895b83ceefded275865e7cb2979a4c02995a017b61a2433e62309e69b57f

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