Malicious PDF — malware analysis report

Static analysis result for SHA-256 13440575f2a9b5f2…

MALICIOUS

PDF

44.3 KB Created: 2021-09-30 17:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 38f333e721e145e27b18f81746d8771e SHA-1: d3d73993592e2795b780862cf41530e79bf92eb1 SHA-256: 13440575f2a9b5f2e56fa9f4325753751e438e7cb8996440e21104272ee9fd89
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised WordPress upload directories and disposable hosting. The document body was unreadable, but the presence of numerous external links suggests the primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7422

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161518c7eb8370---93701594002.pdf In PDF document text
    • https://betamachinery.sa/other_files/File/91880207075.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/refuvub.pdfIn PDF document text
    • http://www.scea.edu.mn/ckfinder/userfiles/files/nurefogoxifoki.pdfIn PDF document text
    • http://beta-rc.com/upload/files/ravaduk.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/75539481367.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/xefiwipunuzanalix.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/736e7d3164256654c99158dce0e6aad2/nexelivopi.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/7226352691.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/mumize.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/12241728144.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/vufogarazowifugabotorep.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/89010872149.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/25052827860.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161326e3406635---tezosanotegud.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/83343942969.pdfIn PDF document text
    • https://gdwtechnology.com/fckeditor/file/In PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/65316971932.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/44725585436.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/56226258669.pdfIn PDF document text
    • https://khogiaydantuonghanquoc.com/images/news/file/maneloboxasibepaloxoj.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/zukubesikuzeded.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16135a3e1c2e56---lumudanagomawu.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/73231910268.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/ravakaduwakezuxafafomar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ocultar+pasta+de+fotos+androidPDF link annotation

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