Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca853677977eb2e4…

MALICIOUS

PDF

63.7 KB Created: 2021-07-02 18:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 81818564168b4e0fd10be9780b6c347f SHA-1: 518b1e6ea3ec85a9c963de52ca0558aa98b436e5 SHA-256: ca853677977eb2e424646d8d14c4195477c62105ad324123095032cbebce4357
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a specific ClamAV detection for Pdf.Phishing.Trojan. The file contains numerous embedded URLs pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9231

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://archism.ru/uplcv?utm_term=hyuna+get+out+of+my+house PDF link annotation
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a04d26e9d7---79531360088.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/ladakevazokefezasu.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b23798e7e35---zodinumuramerujedufi.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/xuxibib.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/35f63e4d94774eb389af65682dd5bd08/lufebagijusomujik.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/9783703874.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2aad2b286---25353550267.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92e471dc0---23960278592.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/124426723eea42c8893c421800a1f7fd/zilezelesulumituvosexovor.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/56c0bef8be48914c6a4c1687e24bfab5/givorufexopubojani.pdfIn PDF document text
    • https://led7.ru/file/xelelodumuwu.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/62038562765.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160917f6af2bff---19369824718.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/747b25cac952ab40d55490f146ea5432/wixubowa.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/xodebetipiba.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/67544512689.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/f3cc68aa33aa6cefcb057bd9011d7bd7/pikotubisuvabikaladisose.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a6ba849e4---12115494944.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/baxid.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/2b548218c6ff53dd367fde7327f54506/67522856444.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/48148514028.pdfIn PDF document text
    • https://retta-bg.com/userfiles/mibopaziwasorasutekejux.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/2187139716.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/77085383176.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 10628 bytes
SHA-256: 8cd37b5a124ddaf52929f33056bd63c6f9ce7882b543701a08e7c1fbe8a6a523

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