Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7810a087ca6e93…

MALICIOUS

PDF

70.7 KB Created: 2021-09-07 16:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ad2e3c9528443ec6f9ce4c661b852023 SHA-1: ca22569c129c6725744fd7c5681216b44c3f2b59 SHA-256: dd7810a087ca6e93cfe5a4a164850ac27664e301fe4f4a74f9725a8834d3be0b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable or compromised hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of link farming on potentially untrustworthy hosting. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6611

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://mediacast.vn/ckeditor/upload/files/wapuzibisifirinekonogidak.pdf In PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/2ce851bcb42859356f4118b44bdbadfd/kogotelibodejewitagimolab.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b2a4a6347---44690761023.pdfIn PDF document text
    • https://filetorme.com/upload/files/gaviwe.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/jaxexigugelumozigikifo.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/d4763a034ec9faba957c753fa7ea98dc/4675858410.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/dofutinanekaxulogax.pdfIn PDF document text
    • http://hasyo.net/files/file/89978447888.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1d44ee99a---59493983741.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/47456202548.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/mapevefuvorolixanuwumira.pdfIn PDF document text
    • http://adveotec.com/img/file/topipuvimin.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161166228b80e9---linibadusizagofedafopavej.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5eb1d8168---36180374442.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/vaponebiwiwo.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6c404a8ad---76582693837.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737f3417bd1---fudaguxisonoxatibo.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/supagewo.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ae383fb64---mitusozirumone.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/dimodijikab.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/10610719339.pdfIn PDF document text
    • http://harrisonsfamilyreunion.com/clients/62911/File/38119793681.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/16250699683.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/74691010960.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=postage+prices+2019+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78F 11108 bytes
SHA-256: 5b522a2f311eb76c6d19f5049ffc904155406c61a746ff62dea086b33103bba3

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