Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8681a2690b7af1…

MALICIOUS

PDF

62.4 KB Created: 2021-07-02 00:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1fb0f6c2e2e9ed3daf1260cd3ef72477 SHA-1: c982edf134b2c9956a11775d73d969f3dee7ad2c SHA-256: ef8681a2690b7af1cff16a20083d969c77a6aaac75f09c80e245306cc3e2e8f1
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6435

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 http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c65b10ca65---susajo.pdf In PDF document text
    • http://meadescafe.com/userfiles/file/nofesubovojisasamanut.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070388b16450---tobakur.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160905dc1d5aaf---31401494098.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/7gibg3u455d3dgqdset0jgalcm/56022975423.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/7ede9df192605a0574519e24f4791fd8/6213303893.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/xetewadajibigix.pdfIn PDF document text
    • http://cjmjwarrickhudsonfamilyreunion.com/clients/9/9b/9be434dcd9982d5451de1b36a82eb828/File/59631234363.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/mibogimagajubuxivibe.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1831b26818---vififaguwuluponu.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fb0ea9f20bef814cd5a3e5f992f0187d/muzudubenogodinaw.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/71665681635.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/3234714fa59643f4261e9bccf7513e11/munafeza.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9495d9804---tatesajo.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/bd93b6c1df22080fec22b985744d1e53/pozemosuvetisanefo.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/diwokilodanefagigituxav.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/87500476578.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/a0863f7ec88fd515e03c5f33d2765940/89666886913.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/debmenmd7slbs42rrkj5lkqc85/mugikupubited.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5edc1bdb2f---tabijilazonoxawopipesa.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/cf0ade6eddad3bd215f144b24a3fd5b5/tiwirew.pdfIn PDF document text
    • http://deltools.com/userfiles/file/zitababozosigajesuloxiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=dell+poweredge+t620+manualPDF link annotation

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