Malicious PDF — malware analysis report

Static analysis result for SHA-256 df37f7e2c2449fc2…

MALICIOUS

PDF

64.0 KB Created: 2021-09-17 15:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 956f385ef14b5d3dc1fdd5f1e7b09650 SHA-1: a1868ad89bad446d3d5bd3b20ee957b51e012d73 SHA-256: df37f7e2c2449fc294bb3a467eb332562c04c93bb787381242f173f29b68a2ae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5089

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://bradzo-ep.com/uploads/files/33551093435.pdf In PDF document text
    • http://irk-yoga.ru/upload/files/12054893661.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/dutinitaladegakusutudavi.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/36522057400.pdfIn PDF document text
    • http://dalaichau.com/files/suluxilelevugewajobepulon.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/kobumoda.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/sowufometebeli.pdfIn PDF document text
    • http://sinoorchids.com/image/file/nibavorarixononezupe.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/90810734619.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/gawamifenijudakowolep.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141129e89084---81685841839.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/6924338191.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/midogikiwakadotobufowu.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/zodiposub.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/pufanonigab.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/pasowepolitulafakilegabub.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/lb4d0tiot26mkiu1kfv84iep71/givegipabuzakivub.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/xogowojupifef.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/8063134255.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/satimeguxuterapo.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/migubap.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/9112887d9ab99a1ebdbf2565c959949c/nigekex.pdfIn PDF document text
    • https://novsport.com/content/File/raruxunimenimuwuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=debugging+cordova+app+androidPDF link annotation

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