Malicious PDF — malware analysis report

Static analysis result for SHA-256 9916e1405b5186fc…

MALICIOUS

PDF

62.3 KB Created: 2021-10-09 13:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3c8e45f2dbbf3781e07a2caac10ac73b SHA-1: e54a1ca88e1282688c8cd84cee2a1e78b5d1d396 SHA-256: 9916e1405b5186fca658b5e83ff06d5141764fd85b6c4605195d49e9d8adfaab
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised or disposable hosting. The presence of multiple links on non-clustered, disposable hosting suggests an attempt to distribute malicious content or conduct phishing operations. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3485

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://ozkayalartrans.com/userfiles/file/26696965575.pdf In PDF document text
    • https://herfection.herfection.tw/upload/ckfinder_temp/files/20210907192708.pdfIn PDF document text
    • https://granitabrasive.hu/editor_up/61926629626.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/60926439401.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/favojugibelad.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210909012939.pdfIn PDF document text
    • http://av72-reklama.ru/userfiles/file/1632294973582a390cd323bef4bad0.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/71628272127.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/42cf2dac9734ccdccaba81ec1cc8746d/12619461720.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/93341910761.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/31070741912.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/pisozuxik.pdfIn PDF document text
    • http://theelementrama9.com/userfiles/files/guwesewalamew.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49178279799.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/refufakofitabikepitobe.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613feb2fb4fe0---46179032877.pdfIn PDF document text
    • http://raczcsalad.hu/files/58822198033.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/zanosaxukitamenipakufan.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614c4fea723bf---3857553574.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/doseriwova.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae4313e33a---zovulexobexebadozo.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/48433396821.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/43496339534.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/mutosaraxekaja.pdfIn PDF document text
    • http://dd-eng.com/files/files/81030864877.pdfIn PDF document text
    • http://deltools.com/userfiles/file/wekazorawejagenasaxoga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=burn+after+reading+full+movie+onlinePDF link annotation

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