Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b974f640b158b0…

MALICIOUS

PDF

101.4 KB Created: 2021-08-17 01:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 45792a49336413a251f6c397a3768b15 SHA-1: 8aa6e6bd3009b24da58f78b91f541c8e0d573f46 SHA-256: b6b974f640b158b0d999bb46cf9f91269fc4899e07b3485ccd8cc61efc98734b
154 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish or redirect users to malicious content. No scripts were extracted, and the document body was unreadable, but the heuristic firings and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8976

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://architettoletiziamasciotta.eu/userfiles/files/kifimijipezozep.pdf In PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/tigerezuxigiloxuje.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/35106185854.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/43688747415.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/nenusuvifuvururipe.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/voxirobolelemebixize.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bdccaea1fe6---57657030703.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/zeralator.pdfIn PDF document text
    • https://okazionche.com/files/35525152622.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e991336216---9140625609.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/wokot.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/mirutibizazudigafolir.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/17916487700.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/jegamaromoronokig.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/darsa05205l40ba72orovqi08o/kebixitokimifep.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/nuxiselajafop.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/gjkfu55q4dta5gj4udc00qubk0/24983840215.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/tifogor.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/ojr9as1n4208kg2kn15stpnbpm/82235630292.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/4f7b594c7d21e69863ce248c9837bae5/padavubajovewegopobebasa.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/melivo.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/zinapugejojezibodugixi.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/getowavugitotefimeruxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=intravascular+hemolysis+vs+extravascular+hemolysis+pdfPDF link annotation

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