Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb3b6403e20a875…

MALICIOUS

PDF

112.8 KB Created: 2021-06-22 20:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77439f7bb2859f547941993897a5e438 SHA-1: b724e6b75f9344c4e5760859e42880107bf587e7 SHA-256: 0fb3b6403e20a87578066116549c0be7b4e3bb9e2ca061a0649d07ba44b4cfc6
154 Risk Score

Malware Insights

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

This PDF file contains a link farm pointing to numerous compromised websites, many of which are hosted on WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and compromised CMS uploads suggests a coordinated effort to leverage these sites for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8942

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://alquimia.in/admin/fckeditor/editorfile/28163677004.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090937b42404---89299039656.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a031161e141---18996212550.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb4b22ace5---muxudobolora.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/614430d94b65d81395cec22ed73899b2/giluvelefijev.pdf
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/xutimulixubukijikibelepa.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c76e8b05b---tokezimalogavulawakemum.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/aa9a805cfc6201d1bdf5ab674b0e9387/lajal.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/ea56b42cc059a48cd0e0323101e5fcd9/boxoxi.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077de13b9633---4939188697.pdf
    • http://suapaiatuipelehakefamily.com/clients/80707/File/9029519919.pdf
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/fepenagimosorusamov.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/c4edfdac333450e83a5f2a700df0fe8c/jaxamope.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bfee18204f6---62830549704.pdf
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/84482278800.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/da8188610f7825a53ae1f467d6377a1e/27062800031.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/30580cfa68ddc6cedc305cb0935e7e33/33761579850.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=holy+priest+best+in+slot

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