Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8687a67d9cc9c2b…

MALICIOUS

PDF

47.5 KB Created: 2021-08-15 14:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ef6fe16737d53984e57dc8bf15df6db8 SHA-1: f12f0f4515baa9212b3b566acf106087d06dfe40 SHA-256: f8687a67d9cc9c2be4f4b078f325359a7af445d36468407dfdd708a35c8c74e2
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/virujewugawizumafekiwav.pdf In PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/2159965b1dfe252d74ff5f73ad1e42c7/lewijawu.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/majofagulilug.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/zikigafumovavixazexejobu.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe0338e024---43319449104.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/jubebifuturudixukedexe.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/8630831bd94da41b3815fc74286993ee/28309516805.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2dde29014---71776832546.pdfIn PDF document text
    • https://flying-vikings.net/UserFiles/file/32410796025.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/6c5f1ce319a7999141d30f6cc7fbcc5d/lanolojelapuruwozobeta.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ua1hmelptne6u4a3h5s2bd2ga0/noxiporolaw.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/33531802224.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/nanudofukavakagelisepipik.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/15509829089.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0090b1960---palaxegir.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/a5e5d8207c5f0e06b303601a3115a57c/23959452330.pdfIn PDF document text
    • http://turnyras.lt/Files/file/94497294067.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/9393f5928a5b7a5eca35d442f854453e/xudenuwaji.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/2d4c1e09458fe4d773886fa0428ca809/vawuron.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1625366609.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/71991720433.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/xewabafamaloruremenagoti.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddac734473b---gakavokezewofovefimek.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/jiburisudexuso.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/kimazaluvo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=dan+price+net+worth+2021PDF link annotation

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