Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1199959047083c…

MALICIOUS

PDF

41.2 KB Created: 2021-09-01 23:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 77c071767443b7009f67a6fead65c271 SHA-1: 73a7174cd597c64c84a46a7e275af820c848f93f SHA-256: 3d1199959047083c1eabc3755f48906159a9b4912630f7be3eb6eaced0ae90bc
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ClamAV and ML classifiers, and exhibits characteristics of a phishing lure. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting an attempt to redirect users to malicious content or further stages of an attack. The document body is heavily obfuscated and unreadable, reinforcing the likelihood of it being a container for malicious links rather than legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8040

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 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://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098b428de68a---poninavetimowopoxazaxi.pdf In PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/fefuwutoxogobusi.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/87774110413.pdfIn PDF document text
    • http://allasclub.com/campannas/file/ritujedavinibe.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/8770f924c4ed2f731945803d30b56722/tijapavubipis.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c678c0963e---48736235526.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/d3bb014ff7761f68c9ff9a753dadca88/98911789640.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/betelilu.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/97918972904.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/4thv9dv9btkjm9nvqsfp4eu18f/27510873555.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/84098096393.pdfIn PDF document text
    • http://jarosi.hu/files/file/sokevijubafopolod.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/61662940267.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6758970517---54052271527.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16092d98bd4119---51378619389.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16088b89ab74b9---dumife.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/futusunijubobunagek.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7c90b0b07---wezifazujugupedepefelub.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/rdej17vkg4k9eh1r8mjerhpt3v/zarobulixonodojeja.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/5239810685.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/87212daed810c7abc3a937bde8315ce1/15662767171.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/jagaruwazagazefezap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=the+pigman+and+mePDF link annotation

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