Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0861c3122af177…

MALICIOUS

PDF

73.1 KB Created: 2021-08-20 09:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d0922b542af8de7718db9d5b6bc00ff8 SHA-1: cb014dacdd9a38e44b35205089c5ba7991660332 SHA-256: ea0861c3122af1777520fe6728339837adf195aecbc85a38b5af00f86fe32e6d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. No scripts were extracted from this sample, but the presence of numerous external links indicates a high likelihood of redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=palme+yay%C4%B1nlar%C4%B1+11.s%C4%B1n%C4%B1f+biyoloji+konu+anlat%C4%B1ml%C4%B1+pdf PDF link annotation
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/44c64fa32287e4a5b3402bdec66ba0ab/kowanibo.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/94631391150.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077b695e7ee2---pilapod.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/vazutafikurukemuson.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/81d0r9vhdp8o6tj7gp45q4q71u/rumofopazuvenugaw.pdfIn PDF document text
    • http://mega.kz/media/upload/files/tagopetil.pdfIn PDF document text
    • http://w-mill.jp/images/file/82406013335.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/lorobunomezotirale.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105081735.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608889674ebd5---42509320669.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16079e5bfdf126---67173479854.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/98636811908.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/76294216804.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/zabuwimepuseri.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/c8fce4616e32bc9aac69008d9466dd22/regeraj.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f5880cfb5---62030068415.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/moboluxo.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/520d0cef7e71c617e35db6bd4529b589/77472531587.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/95325335721.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/kofurobuzajewugunafumolup.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/gutunaroramomu.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/795b0e98a97dced0154afea3cfc17166/nenobevitukaxubowugibiz.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/baxolosaxulovotodiv.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_off0000bb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB26 11400 bytes
SHA-256: 60580e7aec53be515f42d9576ce210de8a8d0ae4780547e70a9eddbc8d3ea4d5
font_01_sfnt_off0000d5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BE 15012 bytes
SHA-256: 07735a93e99fcd06fe755af59ae248172a1bab463efed2bf6943eed44edebade
font_02_sfnt_off0000fa99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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