Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd24246cf4a0b8c…

MALICIOUS

PDF

84.6 KB Created: 2021-07-06 12:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 461b3df75d018d98a12c77166c6449b9 SHA-1: 7d9e27e36e76224acd90a6dce8bb940cb624460f SHA-256: 6fd24246cf4a0b8c70e80891a59d3aeb4917b3682d464c570425ffed7cb15773
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file is a PDF document identified by ClamAV as 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs, many of which point to compromised WordPress sites or other potentially disposable hosting, indicating a link farm designed to redirect users. The presence of these links and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3390

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 http://teechart.com/uploads/images/files/jiduwe.pdf In PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202106181924255629.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/uk0k125a6rsnko97ea4543kjbd/zonigo.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/9180a49e656ae7a09d0cc3af358fd573/zadivovimomewe.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/fojodidupitikazeku.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fcc29ce04---89097991977.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/81772046061.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfecb026cd---67931277326.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/8defa44d5584b9135c6bd00eeb5a4573/81357082059.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/gigujitar.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/tozifizatewewetabukezu.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/bisosatudo.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/77175924563.pdfIn PDF document text
    • http://apsons.eu/files/file/55519870950.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/cd88e9a24d18926d83b2ef418156a1eb/repewitazimalu.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/widalosijodemenelinugeri.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/susenobasop.pdfIn PDF document text
    • http://climtech.com/files/files/tuvofurasigavewuvawuvi.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a5baabeb5cb---dizabip.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607224ff1137b---kidokorov.pdfIn PDF document text
    • https://postelezmasivu-plzen.cz/ckfinder/userfiles/files/gewoninefe.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/vuninaposemug.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/74382404079.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/vozebuzozapawelidogawitu.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083864cc810b---35320873154.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/oafcs1qrpnu7b1p9vsvk4bsjaq/63102403019.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/663e5e6f343357293887ec1f741673aa/54709135831.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/tikawemiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+do+you+get+a+wither+skullPDF 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_off00010838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10838 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001204a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204A 19580 bytes
SHA-256: a40c886bf57604ab3ef7458312b9bc91cc90b28de6b1eacf2c8484a4c1d8585d