Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49bdd42dafc2fb4…

MALICIOUS

PDF

47.6 KB Created: 2021-09-18 06:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9121553ff66bbabff842dddd42f853e7 SHA-1: dabddd8522a982d96f4554ad6b0b3bf8f029ef8a SHA-256: a49bdd42dafc2fb4c0c66356ca929c4cde3f41b7adf077c6baeb1e9a9f70f601
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links to external sites, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, further obscuring its true intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6441

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 47 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://isleo.com/i_photos/file/16103126718.pdf In PDF document text
    • http://kutyasturak.hu/images/files/nozineforebonolid.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/fofutidodawefepamefutuge.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16136e52b10b5b---bozebarupagij.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/janifawevuduw.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/sikakaxe.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16145186a475dc---tepuxizitawu.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/taretisudinubuxopag.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/h7q0mavr3mf04he13p5c8uv9ie/mowisesexuboxoturenagoj.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/pivevawupaditokuvu.pdfIn PDF document text
    • http://pilatesmystyle.com/userfiles/files/jurese.pdfIn PDF document text
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/fiveduvirokijubed.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/cc66c55216c0614434c40faaff4747f3/kezazixufaxabofuralole.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/92690118119.pdfIn PDF document text
    • http://akiisushi.com/uploads/files/bifonoxafurer.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/29516386319.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142519d1dabb---pegepevorifiwaxofafo.pdfIn PDF document text
    • http://hanauhrova.cz/files/71996108054.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/4da1c1a5caec1a3f670e32782c9fe7fb/25467700367.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/77700446322.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613123eedb176---66092917866.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/guzixadokusopikinifuw.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/21670569649.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/68026437993.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/20827050389.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=sex+downloader+for+androidPDF link annotation

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