Malicious PDF — malware analysis report

Static analysis result for SHA-256 217af446923b0dac…

MALICIOUS

PDF

70.7 KB Created: 2021-09-01 16:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0ec02a84a395af39aff9e606f774e51c SHA-1: cdcf30721c8325262842d35b652a81b878a58078 SHA-256: 217af446923b0dac86db0d13deca133b00efe065ec8343c01af130e1e0417267
154 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct textual clues to its purpose beyond what the heuristics indicate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6885

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 https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/0d0f9d891a2af4be6d5afc9ca16b8905/64016198361.pdf In PDF document text
    • http://checopharma.com/upload/files/86910990853.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/xataxosezazoxi.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/0f712593157577a2d0443e5e68daf8da/20312801785.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/90453f9d283f2ea11b01557fb3cc9438/49487640044.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070cb76da67f---89396942927.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/nulajokalu.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/9153144575.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/c1c39cb25d0641e7137cbc37940bb7d6/81838981664.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/musexuw.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021730163669721.pdfIn PDF document text
    • https://togeltop.net/contents/files/44403327890.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ri8blso4c6k4os43lp2ho1h379/85888219110.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/3f229a04a320e092f7706e6a9ad7d503/vonoxow.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f4d54e4054d---80493757199.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/c777b7b45ebe9a09284184620b874a14/47959073232.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/32007069010.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e6fdd056f---4041800403.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/mu9mptdugoksh1a86unqmlocln/lebevifejaxilufe.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a653f68c3c---rowinogipijuzetab.pdfIn PDF document text
    • http://airfa.it/userfiles/file/debav.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ee8c7bfae---fegaf.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/datuluju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=rigging+a+drascombe+luggerPDF 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_off0000d2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E4 10900 bytes
SHA-256: 149c8f02faea436d812906ba92e8698c5a64b9f2976cfec3fa92888def0159e1
font_01_sfnt_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 16680 bytes
SHA-256: f41392cadc61966957927d97f7a177c4277023b1df8a8c3464665f818cf4cf35