Malicious PDF — malware analysis report

Static analysis result for SHA-256 9389a27c8d7f214b…

MALICIOUS

PDF

77.6 KB Created: 2021-08-15 04:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 56cddd4e2b5c5824410e66ffae70b760 SHA-1: 2d4ac8077296749b29aef7667538c73d6e2323dd SHA-256: 9389a27c8d7f214bb7c9c5dec19d751b113a3e09ad791a5c19d61472b75a66f3
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier also flagged the PDF as malicious. These findings suggest the document is designed to redirect users to potentially harmful websites, possibly for SEO spam or to serve further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5251

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 http://afghansolar.com/userfiles/file/98487558139.pdf In PDF document text
    • https://bkht.vn/userfiles/file/55051281873.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/f44s543bmu5aohrprujffgdqispteeo5/komanedujevevavopepo.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/62b1df46476469d4ec3f54c351fec71c/40317215439.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8e673279f---72566623299.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/vubikanaxate.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/nifinotanovofor.pdfIn PDF document text
    • http://hjtech.org/admin/upfile/file/jibobogezujazolesikibajuv.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fb535fff4967f58a39790433b9fb342a/bebuzejabuxej.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/45889638740.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021051608521773499.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b083f636ecb---wofejiwo.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160778e65e1538---56812989367.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/73135279991.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/mefogijuvawowodexozij.pdfIn PDF document text
    • http://dzbnf.com/upload/file///61416310040.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/susiniditiguluxurinewa.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/94093960648.pdfIn PDF document text
    • http://solucionesinmobiliariasavg.com/ckfinder/userfiles/files/nipaduvopigade.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/81026c8842a553d07dc459246b36bedc/feliwumadixodejufozumod.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607406ba05884---45828574778.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/gafebunudoz.pdfIn PDF document text
    • http://drlalashow.com/php/billboard/uploads/file/83986606338.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16084e6a7ed33a---34400356568.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/27936136054.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=yvain+ou+le+chevalier+au+lion+questionnaire+5eme+reponsePDF 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_off0000e244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE244 18956 bytes
SHA-256: d72cdbe5cd2552ce1b657ddd09faf61d21d93a77ac0ed1a81e1fd6bdd320caef
font_01_sfnt_off000111c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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