Malicious PDF — malware analysis report

Static analysis result for SHA-256 7edba8c7c08b89b6…

MALICIOUS

PDF

92.7 KB Created: 2021-08-04 01:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ca8ecf56e3e11a1a2e3c3a63a7b84640 SHA-1: e963c59c5895d4e5a4f7ad3f5874fcd40e28876e SHA-256: 7edba8c7c08b89b616ead2159f69eca6cd7d7f8088fd7faed6ad51f749ca2546
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document functions as a link farm, likely to manipulate search engine results or host malicious content. The embedded JavaScript suggests potential for further malicious actions, such as downloading additional payloads or redirecting the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • 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://laborke.ru/uplcv?utm_term=o+poder+secreto+do+jejum+e+oracao+pdf PDF link annotation
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/ks5pt73anhb46sefm4k0rcqj2b/9331281176.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/51397282448.pdfIn PDF document text
    • http://quaker1960.com/clients/3/34/346d0055920ff30d27c63167e405b0e7/File/75891289716.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161009cd759b1e---mepufujiwidufolipevusofow.pdfIn PDF document text
    • https://la-klamm.org/Files/files/78696578926.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/99314699106.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/kufaxafadogivotubomadib.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/64594643173.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/lonizimemozu.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/380c16357495999d9acfa34e945aba46/13048230151.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/morezu.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb34a93534---76095806060.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d357d52b9a---xofopedune.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/f715eb582e6c1df70df7ee081151008b/89586211310.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/zefufapanup.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/27ce517a6dcceffca4ecc771707a87fc/numikadutefaxurafetegi.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/91898329982.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c031e3143---lugibelijibotep.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/8fhv3ullk7p1737ul20d9p9qni/73972926040.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e9948d607d43118445362ea5ba0f2ee1/16415013057.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5127b88a06---80182428558.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/47988675465.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/kixutilegovipir.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/e61h336a1hu6f9am83lpdmqbu3/18577657294.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/12316054651.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/jubolobaja.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_off0000ff56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001176d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176D 10796 bytes
SHA-256: 7724ea3602b7cf4432038190a89feee63576ac28f72a15d95f5ced7c4729e3fb
font_02_sfnt_off00013062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13062 20656 bytes
SHA-256: 03bfe2d3bf5efc373e670543b2c2bc29f12f5e337b4ede99a4eb57863d84c8c2

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