Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5bb101c98df67ce…

MALICIOUS

PDF

67.5 KB Created: 2021-08-18 21:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4a4ae2406751bcd8f53e3084de25ee54 SHA-1: 2d5ef2d6f5fb660d0c48c0318f26c24a21bd6679 SHA-256: a5bb101c98df67ceb8a70767ba8bb9956b1c0a53baf517ef524119e6d43e5ab7
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of numerous PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM firings strongly suggests the document's primary purpose is to facilitate access to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8399

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 http://globalcenterhotels.com/bot/ckfinder/uf/files/xanekikowotod.pdf In PDF document text
    • https://hunde-katzen.at/soubory/53403194301.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/nesegoludimoniresosem.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/vuvomevokogunepogej.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/dorozezedinovexozakisuwu.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/zabezokerolodetiku.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160acd96dbf61c---135357682.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/sikixaledigofusijevexaze.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4a35530ff---vovanolebizukowabivigix.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/gupufesabulixova.pdfIn PDF document text
    • https://edbcagliari.it/file/gufuzinufukojedimefeko.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/52817406265.pdfIn PDF document text
    • http://soundupgrade.nl/site/data/ws/files/93342533914.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/gegodelegobupesemavuwolu.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/rakanunosaravasepolusone.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/5eanrb55l1e8hpi0amqi8m3rh5/zukemodepapok.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160d613650da64---xikuvuvevowosajafur.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4dd4e8753---jorutalexulokulodoxivo.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/97584710358.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094d65ba251e---vobufigarukazufogogegovo.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/kawelakevoniluduvuwij.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160802537dba67---19329693663.pdfIn PDF document text
    • http://chapmanhighschoolclassof1968.com/clients/c/cb/cb1fed5110c07f199f416a264ee6943c/File/93605145658.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e47b3c885---90047269682.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=conversion+l%2Fmin+en+m3%2FsPDF link annotation

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