Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ec47680e66e545…

MALICIOUS

PDF

66.4 KB Created: 2021-09-06 11:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 52a6e2b79355726c6a115448340910a3 SHA-1: a985d279b0e4a9b708c8e208884d688d64659f54 SHA-256: 32ec47680e66e5455568281cdfb043adaa11545b3c5a47d424eb969afef94135
94 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 other PDF files, suggesting a link farm or redirection scheme. Several heuristics indicate this is a link farm on disposable hosting, with some links pointing to compromised CMS upload storage. The ML classifier also flagged this PDF as malicious. The primary purpose appears to be directing users to external content, potentially for SEO poisoning or to host phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6235

Heuristics 4

  • 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://synerhu.ru/uplcv?utm_term=echocardiography+pdf+free PDF link annotation
    • https://psychologgia.pl/Upload/file/sisavizeporeroviruj.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/bafenutirumusavunubesozo.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/degudoxir.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/vogetibofufetobama.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/5823386929.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/ziwevo.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/mixaxazukenaxawegajil.pdfIn PDF document text
    • http://mebell-city.ru/ckfinder/userfiles/files/42967922867.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/zopinezafidosenibo.pdfIn PDF document text
    • http://www.facyt.com.ar/ckfinder/userfiles/files/24707329549.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2fd0937ac---sonuwikugibu.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/73517893563.pdfIn PDF document text
    • http://burchiellati.com./file_fck/file/99097743622.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/regofuwemababiwupufe.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/nogirorabe.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/pirexifideb.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/7gsi8m5fjdobqk9lv7knf2qcm7/fugusodibusijevesi.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/xavuvutesamevixa.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/lizofojosopudapodej.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a7e0f10e6d---jatewabibobu.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/1sv40nbk01sg1099ihpuf8cqj4/58944999472.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/gipuginidin.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210713040436188.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753bda152f6---18584717752.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.