Malicious PDF — malware analysis report

Static analysis result for SHA-256 181404e21bccdd0a…

MALICIOUS

PDF

64.0 KB Created: 2021-08-08 12:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 91c985aec7c65d9cca86210c92fe14eb SHA-1: 2e2f61b44832d9da8aab6791c708e8c151a04177 SHA-256: 181404e21bccdd0a0003bb35d2a497908dfedd514d1a46e2dd16974159ad870d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with multiple URLs pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://pixomot.ru/uplcv?utm_term=how+to+cook+frozen+edamame+in+oven PDF link annotation
    • http://seamcc.com/UserFiles/files/79776930864.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608740ba97543---tabepomezutego.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe6212329e8---15472189627.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/219573374528eca7ae0da7b7d94d72ac/5907415154.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607018f7721eb---14372248361.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/68060308888.pdfIn PDF document text
    • https://latework.cz/soubory/dilis.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/37393782230.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/sarowo.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609caa1a6f3fe---wonefokode.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/60426900921.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607573caacb14---kubotedomitekumesezozud.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f79a1bd40---wowimobaw.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/niwifefefoxawixo.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/36868817502.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/86715365690.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609844a47ff94---pufube.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/pefadajilelimegusazafizel.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5545ca5f5---nodadage.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160890627c21a9---tanokuf.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/larogel.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f89c8026c4---35610005577.pdfIn PDF document text

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