Malicious PDF — malware analysis report

Static analysis result for SHA-256 64dfeca6faa9b8c7…

MALICIOUS

PDF

45.6 KB Created: 2021-09-28 08:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8e1cc3aab838a83f452f6ff678945d1c SHA-1: 55a9543416674d077f0680696402bb09db09031c SHA-256: 64dfeca6faa9b8c7285386efe3a828579455fd545e6f8758539b471412afc7aa
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and is identified as a phishing lure. The document body is heavily obfuscated, but heuristics indicate it is an image-only document designed to trick users into clicking a link. The embedded JavaScript and numerous external links, many hosted on compromised or disposable domains, suggest an attempt to redirect users to malicious content or initiate further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7790

Heuristics 7

  • 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 45 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f19c6ad9df---46724574092.pdf In PDF document text
    • http://vinhthuan.vn/upload/files/dewukivoverifikeke.pdfIn PDF document text
    • https://www.l-games.jp/js/ckfinder/userfiles/files/kedopugonoduvanaxax.pdfIn PDF document text
    • http://archive-2014.humandoc.pl/attachments/file/mizagonamifuzeturo.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/33730346476.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/madino.pdfIn PDF document text
    • https://shturnev.com/files/foFKED/file/90530762758.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/73813303937.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/161425809d152b---3183567357.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/gevipew.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/21130555921.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/64094132144.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202109170207322053.pdfIn PDF document text
    • http://scandinavia-ex.com/images/blog/file/16592412339.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145db88ef238---muzudomododuzagapid.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130087cefc5c---22564210977.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/91649820115.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/mokaxuneridal.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614f3ad8d4319---xaranala.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/86c0a7c1556198752f98e694a7b10aac/63099230047.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/161393318cbce2---tofiwusufemifivivet.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/75940306325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=android+graphics+moviePDF link annotation

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