Malicious PDF — malware analysis report

Static analysis result for SHA-256 93de14ba921217b8…

MALICIOUS

PDF

72.1 KB Created: 2021-08-15 05:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 46b755b375a8b17592113186ad0ab2e7 SHA-1: d28f7a1fd517a7381f91ceb76c36d032e3daa589 SHA-256: 93de14ba921217b87ee4d55502877c8e49bbe4b46c53af8f4a38884468d07d34
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6523

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=download+axemen+gyration+audio+mp3 PDF link annotation
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b4c4893ee---nefenegigamudoki.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/c908cf4ec98c9b7625ebefc7a7a8ef5a/milutuzu.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070cc7340242---lolutifixofedabe.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/54957711359.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16071c5f6f1250---baxalitodubufovokiraposas.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021052116571837.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/supisulalotozurapolagid.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/d115cd0bbadc3cf5a1131e9e80caf582/33000249512.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/81480528638.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/502jeufs99c4msbrjhkn5r9aqe/77744981996.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/70412137365.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/821cd11fce162d42476f79621366241d/67798644434.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/refoledofeforifixix.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/8tk1af7njb195ur8fjfk9r39cl/sisiked.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160782004b7110---selugeva.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/pokoxobilevomujitaxepaxix.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781ed736892---35775957280.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/73904680015.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/wanekuralu.pdfIn PDF document text
    • https://kermanrooz.com/img/files/52854150656.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5fd041fdf3---55445784959.pdfIn PDF document text
    • http://suriyedostlukdernegi.org/image/files/43245500230.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/xenadixilu.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/92843287244.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af5400ea3e7---67726724623.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021060916560849.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/17b28e1f208570e214a4718fbf0a1680/kizigemovebijele.pdfIn PDF document text
    • 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_off0000e942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE942 17048 bytes
SHA-256: ecd44d2bb3fd987599a5ed9a0d2c45e4947ca543bc1350c0ae31b00cb2ea8c5c