Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bfa4652c0e96ddb…

MALICIOUS

PDF

78.1 KB Created: 2021-08-16 05:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3eca5cb855c24068a49fc2d93cafb1d7 SHA-1: 294c284b8506bb9fd63faf70f6bccd25ba7e332a SHA-256: 2bfa4652c0e96ddb18d6620d16122a457c2aa792f07fdeb2a42a436bf16bc71a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many pointing to compromised WordPress sites utilizing the Formcraft plugin for file uploads. These links appear to form a link farm designed to redirect users to malicious destinations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5182

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://laborke.ru/uplcv?utm_term=how+to+be+a+guest+on+the+breakfast+club PDF link annotation
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086c1a6d676c---44529104350.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/0e09c83be7f016f52cd05746ec1cada2/mitenoxuzeped.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/fikujirux.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/2021526181937.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f08eb0e399c---bomenitutabuweve.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de08819da32---xaluse.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/balet.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/laletezeviwules.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37712991be---53092160221.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070bb213191e---gazom.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b53b854a1---vidifiwol.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/36265623089.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/a153c453096dce868bdea70b4e8fd254/suxudiwexebadevupilidulu.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/00b805aae3dffc7640861dc2b431952a/84296170924.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/77872847269.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e1075b66bfa---xasapukamo.pdfIn PDF document text
    • http://qzgj.cn/upload/file/kuvurozukegapanemuxogu.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/1grdjnebih2n9e82kfcbm7uvcu/41745912213.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/90668814665.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/mekovosu.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ded7f71071---pagewanesif.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/4b14f7d9765547774330797543645618/85087637296.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/74333878389.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/sokopovabawuzu.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_off0001051a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051A 10932 bytes
SHA-256: 28b2842830c255d33f8ba5ce410185249d466faeff0d7fa3f1d468319c25b524
font_01_sfnt_off00011e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1