Malicious PDF — malware analysis report

Static analysis result for SHA-256 861dbe976679ef2b…

MALICIOUS

PDF

55.8 KB Created: 2021-05-10 06:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d085ee4200d98348878cc3fddad2f4a7 SHA-1: fa8f55e3601cdf8e52e4caea9926f6b994c5f7da SHA-256: 861dbe976679ef2b6d3c4efef8959c3a82b9f502f3b6cb82d5c508b312d2c72c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7086

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 https://oniceh.ru/uplcv?utm_term=vaaste+song+video++bestwap
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080df60ac38f---46366411012.pdf
    • http://altelaw.com/uploads/image/file/kidoboguvofuviredonekaxoz.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/5fb915dca60c1372e355fa7041b3205b/pegadupewetotedepuwizimi.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/oi2tset6mk3p2nsio5t5lhae8t/71741453153.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/fb079fbd608800fa699d7bbd25628270/69373025189.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080d9ff0aad9---37595699997.pdf
    • http://antifftech.com/uploadfile/file/%5C/2021050623571330.pdf
    • https://biocoils.com/img/file/sosoxase.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/1c821e7b077438fd81a5e0343de5f67c/buputagevipeni.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/0082b6e5a7d8cd1a61622a5588f153e3/61099613551.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/51c3dc830912c0c7a7ef5e9835a22478/bufoxikuganowirubefupodu.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/c05b11492d9bafcc7d136803e62929a6/tolinujagajisulerukena.pdf
    • http://worldwidefilipinoalliance.com/uploadedFiles/files/dinojikebelep.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b54190ec8---37401800047.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/81438d6c1e8fb5ce64118918464798d8/zomidelizagogos.pdf