Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9497d818c8ce8da…

MALICIOUS

PDF

45.9 KB Created: 2021-07-01 15:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: aa7373b14732c7ef3065f5e97f2893e5 SHA-1: 4a7c7dc9cdbca1c6c12a95147276f4a95b55e2e8 SHA-256: a9497d818c8ce8dae1f38fc46e47a95b3ba91e0b87526bf834181c6258d741c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to malicious or compromised hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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 https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4ab7ec68d5c9f4b702fc6a9c375e99e2/3446435080.pdf In PDF document text
    • http://longvu.vn/Images_upload/files/vuloz.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/69723083678.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/u116lt360q0dq2ehnmqf88ke00/10485856800.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/fogogomamuvejegipawisa.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/73229365002.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/87cac4d1ceca636d3d868fa97aeed84e/56957210171.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/73427364699.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/5117274573.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/e0hvb0qu11mqjgu1s5u863t86r/xoletefusozovofisol.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861de3dba40---87682141357.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/e130b69870cef6c7bafe0f5dbabc5279/jipebakotisido.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/1rpbimr3m5d47arusf22d3k8ib/48312932476.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/a88628bd5d20e01ceda9492e49a94129/dakorasitomenuwatowu.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8e7d47549---kojujanebalirixa.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/xiburixafib.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746e1b7c221---bararepegevexaniwitebod.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/duvesuzovirit.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/bmtme7lcggof1bla8i27bkjrqj/pamemurotafemijolu.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/koxinoxetixuvuwidigezimov.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607769cd08046---noferoximemigozorefa.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/3446101305254925aa484a8b715aa6fb/muvotasajewepow.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/18370656788.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/3a597ac6ba5d013cf7ea2c6cf1160cdb/safos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=olympic+running+trackPDF link annotation