Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6315a95b7e31cc…

MALICIOUS

PDF

82.4 KB Created: 2021-07-13 17:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 25d8b4193115db498482532b8a83d905 SHA-1: 81a8115e5db8a2cd5f550616b41a8dc6588c934c SHA-256: ce6315a95b7e31cc9107c4c471b58b811584504e1f3c3ff9df2ff80ec801e4d5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to external websites, with several links pointing to compromised CMS upload directories. ClamAV detected this file as a phishing trojan, indicating a malicious intent to lure users to potentially harmful sites. Although no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4803

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://agrolliance.ca/ckfinder/userfiles/files/48943592799.pdf In PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210703_7352DDD7868AC804.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/f62d996133d99b25cc3d324436a34b15/zujuki.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/jisivojiluwux.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/g7ig2gnobc2v7egi7j8fokh0mm/fifogofipixajakadifodami.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f2871124e---gifikoz.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cc65be744---puvobikinupineti.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/e7cc2bba8f5594e3ebc2f15ed33a6896/74250134139.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/xereb.pdfIn PDF document text
    • http://sixtyguildersresearch.com/admin/photos/file/bumazikuzizutonitod.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/d8alpt96n984i4csf39fa38176/vodoki.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ac6d6e61b33---fagetuzorisuwis.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/4b39955f7351491fc8f0d681a8eab00c/foraxusijurejujajasu.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/gobibagapabobusu.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a177be8572b---xopilofanetuk.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5568e6aea---tozilewop.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/telubomu.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/g2hooeh7bmovfg00q077iqvm7j/mozefugo.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/lp68sqgtqdt017umlcp2t8o93n/xazugitadojopajasavarex.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/a425da698049d6e7af876b472dc21254/womanabejadimub.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/e4c311613119193c3729ed7fa58cc1b6/92938003094.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/e25b143497e25913f4ef93f0c0425913/gupejuja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=molly+shannon+snl+charactersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF779 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8B 17384 bytes
SHA-256: 71f6a4a96b034ba98131c83128fd02bfa6a729c7b5149b376b0f73351762c5c2