Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f11c64d1a5ff97…

MALICIOUS

PDF

44.3 KB Created: 2021-10-02 12:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 39d3091d3df51951746c012d86a5dfa4 SHA-1: 816f1e86d7da040d07a32941dff632f4d19c66f0 SHA-256: 34f11c64d1a5ff979d294cba7ee8f5beb4b4510d776ba32f91aee94253c76a52
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5141

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 https://ketchas.ru/uplcv?utm_term=only+you+are+holy+donnie+mcclurkin+lyrics PDF link annotation
    • http://kamkmori.cz/ckfinder/userfiles/files/fofamasodew.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/90777549475.pdfIn PDF document text
    • https://thisissati.com/userfiles/files/lizulubumizuvazugen.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/97334227725.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/57738391195.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2d74b01f4---buronon.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/sizewokefowosipowowegizet.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161562616c1a05---60118708800.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/44131839209.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/81115718623.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/solulojemopo.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kiverujeli.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/juwukuxapobovovotax.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/94529761312878535f8b6c268db52032/15797179238.pdfIn PDF document text
    • http://kondicionery-lobnya.ru/upload_picture/file/widumozemozawav.pdfIn PDF document text
    • http://fpole.ru/sadm_files/didijezozewebidas.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/nijaganir.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/kugitivep.pdfIn PDF document text
    • https://immobiliareincentro.it/allegati/file/18147218588.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/jobulopam.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/xakowepufonegujafawi.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/44708018671.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156b869bbed0---zatutaxebus.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/toliwimimitedumebapip.pdfIn PDF document text
    • http://www.integra-cr.cz/administrace/ckfinder/userfiles/files/nixemewinirilolodimozoz.pdfIn PDF document text
    • https://drhuanghair.com/uploads/files/202109251158517885.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/31216398068.pdfIn PDF document text

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