Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9ee3951366ed38…

MALICIOUS

PDF

77.5 KB Created: 2021-09-07 14:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 934d256fedce3aefb582ff5100f2bd92 SHA-1: 48751cf103783776ac6f7147775200bcc03f0724 SHA-256: fa9ee3951366ed38209eaea11fab2fe0e7beb73ccb702ef1e11a35454cc033df
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5430

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://philabc.ru/uplcv?utm_term=tobie+lolness+pdf PDF link annotation
    • http://amandatravel.com/userfiles/file/wokokimitokixakunexe.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/sudupetuviwusugoguz.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/2751242034.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/pesaginug.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/tamefidaz.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/14986849606.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613682b5aa7a3---65289206534.pdfIn PDF document text
    • https://rockeit.com/userfiles/file/7072250094.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/26227816329.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/44173164387.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c5de42d80a2---96512116461.pdfIn PDF document text
    • https://atesolve.com/ckfinder/userfiles/files/dajipejisu.pdfIn PDF document text
    • https://irrisyst.eu/files/file/guvop.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/0b73871321e1be7f32aa211bc5e70f83/52295387624.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a793069e52e---45215152513.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607184de52392---67101847770.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/jubopizage.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a13a0e1eb0---34270874140.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/11135989543.pdfIn PDF document text
    • https://menu2uplus.com/images/file/vubememilovaxanu.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/tuxanumoxugupegusumesaze.pdfIn PDF document text
    • https://aspirans.com/files/file/87768546039.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7940b3f5eb---rafukiga.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/mawavazagulegakodoramok.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/30879400142.pdfIn PDF document text
    • 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_off0000ecd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD6 19856 bytes
SHA-256: 1e79baf1f4d2e1f85a8d0074056232df33f77ba3a5a8db05018568095b28f40a
font_01_sfnt_off00012029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12029 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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