Malicious PDF — malware analysis report

Static analysis result for SHA-256 217d602e089e0097…

MALICIOUS

PDF

83.1 KB Created: 2021-07-25 18:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2831281d62b36c6cb72211c88519cca8 SHA-1: 6c0fa57772092a9863df5e78537d89104db403e2 SHA-256: 217d602e089e0097b30d996db5afdad2808f1de06d85e4ed064c5b57234dbf05
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, many of which point to compromised CMS upload directories and disposable hosting domains, indicating a link farm designed to redirect users. ClamAV detected this file as a phishing trojan, supporting the assessment that it is used for malicious redirection. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://smithmaloney.com/clients/3/32/32eae1a42220421eddab78da2f55685d/File/71744735317.pdf In PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160748b5e3a54e---49752710142.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f23e23c393---vezoribanigifudira.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f0a38a9ac95f844b1fccc75739e03a00/31042398878.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38ee1953e4---95005149628.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/55q5pe1fe7mnpmbj7o895ebag2/63298631933.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/e5b8260a60be3d4ac38cf9d9d093afe0/xolivaxuxojugebekupegorud.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086f43a51f5c---sugifokuxiv.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff9148de8e---zukunakilizovepi.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/jusisimiwoduvi.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/4822439016d1c0be599ffa68b94f8654/47799647399.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/50040542563.pdfIn PDF document text
    • https://smilepaper.tw/archive/upload/files/vofizero.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/8115b4aea6e7e29158192bc3688e27d2/bisaluluzanorawavuv.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/86909991090.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/af89d0e8815be100a8676617a897fd2b/joruxemu.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/825e90416373036fea9f7fd80a683bf7/rovoxejegopoxeparo.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd977c83e6---salabumali.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868be8e08f9---tuperibulatafuzixibeza.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6bff4679f---70645502892.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606c788923ea5---razaf.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/sezonumovosifedixag.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/35910397495.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/34768281049.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/55760940738.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087d761f0cbc---69459259770.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+be+an+explorer+of+the+world+pdf+downloadPDF 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_off00010b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12330 10652 bytes
SHA-256: 7f6a3bc58ab897b70b77ceb65f39ff7849864c11f2bafc41b42ae57aa39c5219