Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fee7337d096cd36…

MALICIOUS

PDF

72.7 KB Created: 2021-06-20 06:36:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8f898c7089fa07b1d7360e2be8d4913a SHA-1: c4b6de75c8148f818c323ec9252177f00b8961ce SHA-256: 3fee7337d096cd36f3fea39fdfd0943c6bda3f9a417933c0fe6f026d59e72b43
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, directing users to various compromised websites and disposable hosting domains. The primary lure appears to be 'Indian author books pdf free download', suggesting a phishing or malware distribution attempt. The ML classifier strongly indicated maliciousness, and the presence of numerous external links on compromised CMS uploads supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7644

Heuristics 4

  • 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://drafthe.ru/uplcv?utm_term=indian+author+books+pdf+free+download PDF link annotation
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/eb442b07918ca38f6ae4e94367588ea0/51091175548.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/69221059479.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/a880b9f13c928bc2a8eabefdd9be4d2c/zalinikuje.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/xanasemu.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/posinufejokopaxifek.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/48630027169.pdfIn PDF document text
    • http://ibb-online.ru/f/file/33194691418.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c77a52a4bbf---11991233931.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/4335007a7fa9c0677df316ff70c463e0/68014317416.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/98732437715.pdfIn PDF document text
    • http://dges.in/userfiles/file/kugunazekazenoxodusijef.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/81302426912.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/14e3e73029041228701b7500864e01e4/33066392642.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/kabavose.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/3d40cfb6468b59c228241b216bbc33a7/27468693263.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096cb044ba73---4614566428.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd369d7623f---70139173726.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/kuxoxezebe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF895 5360 bytes
SHA-256: ff4af900b092d556cc7321cbb0964a1d706e523714af0a2de4765f22b65da23a
font_01_sfnt_off00010ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACE 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b

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