Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb943a411e47cdb9…

MALICIOUS

PDF

66.5 KB Created: 2021-09-05 12:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 620d7e59a43457eeea9538d77d554997 SHA-1: e4e41ccaa040a9d57c6e6a982cc4140c3b810050 SHA-256: eb943a411e47cdb930fed70cd45aed278c0e2f833c7ca63cb2e01e33760d49c7
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to external resources, some of which are hosted on compromised WordPress sites. The presence of these links suggests the document is designed to redirect users to potentially harmful websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8255

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://pixomot.ru/uplcv?utm_term=clinical+nutrition+books+pdf PDF link annotation
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/ctog8k8i2mp5dhq8dg1d3u9chv/64572626718.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/zakotevuv.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/kd99oh5go3lvsencjsmfgpu9u5/44508871257.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/eb1afbf14438016f41d303f7797a64b9/revegunazeredukixu.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/81754335692.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/66699184690.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/gezuvamip.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/12112398db0040f0a5da2a516bf7259f/dowudaserolodakodaz.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b276efe516b---kagokomodozexabitenozekap.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f913b6b17153e15214bb64d90e0c1495/2548805268.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/bijewowotezab.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/11fdb6fef6bbcfe6bb762fa919ce5c61/52457519388.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/rodorafewufuni.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160ae610af109c---73265199175.pdfIn PDF document text
    • http://childhood-matters.com/clients/49507/File/movixunibogi.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/11849142194.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a34839cb6---86401802431.pdfIn PDF document text
    • https://thehouseproduction.net/file/56495888595.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c0586e987b6---68043093882.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc8443c3b39---70326053287.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/gobolesise.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/f9e563179d871744018284caba10cdd1/82440100461.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/j8oh82f6e672jpaossdlt03262/zeremapipumunatojatawoj.pdfIn PDF document text
    • http://pitneyclan.com/clients/c/c7/c7afcfad87c307b096642b2e35f52d25/File/xusewo.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_off0000dad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 10844 bytes
SHA-256: 6a01477f86a6ee8c65fd3b074208550d8361f58f5547ae35f8716a095f4f84fc