Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbaebe1c9353ce6…

MALICIOUS

PDF

83.2 KB Created: 2021-08-06 19:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5c138c8ebe9ec960eabe5c9b77b99782 SHA-1: de17896fbc730183fc665242502945fb8ba4584a SHA-256: 3dbaebe1c9353ce646cedfef497a896f98221dae625119ad7b5632c9d332dc5d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6964

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://garglob.ru/uplcv?utm_term=writing+topics+for+esl+students+pdf PDF link annotation
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/mf5nhn6ctspv79sqedp4id7a13/suwagemegof.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a9a2627c3ea422cc30ca31ce7608d22d/xovomajunadejejuzavizo.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/maxibuposadale.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/gefenotixane.pdfIn PDF document text
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/tanese.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/8k2o261t2la40mlcetfvscthg5/98606720605.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b318ec858d8---11216282090.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/7908173569.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/589830621e2c65d5fac89af80a60995f/renomarovowudubizujewine.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/59925823575.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/96100435601.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/70651232224.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/xawaw.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///baduviganeguguzaximuzenek.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1a6434350---nejijetunoxijavef.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa89169bc1---44814037152.pdfIn PDF document text
    • http://rococosofa.com/files/files/nasusomudarini.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160f6daecdfdcb---vagimaguwexutipudex.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/d4389d67bb226c12dfc582ef0444fe68/mojepapo.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/tonifadixepuzakavit.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607565998e994---duxazolunaratosebuvowi.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/9298635193.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/1858797506.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/9pi7m0ghmid3ggvf2lmhnf0u86/73928529399.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/97492169692.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 17520 bytes
SHA-256: 771c0df0f0d17d0f4db2c054ce5a7ad9fdcb4a6f2a9eae4e893fa3acb9b17920
font_01_sfnt_off00011e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6E 10724 bytes
SHA-256: d777633017bbb73428891beeae7646e64df186a06a3d6d06d39ce04dac6c4735
font_02_sfnt_off000136fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1