Malicious PDF — malware analysis report

Static analysis result for SHA-256 928aec9680954d71…

MALICIOUS

PDF

47.8 KB Created: 2021-08-28 16:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1dfd261b920b64b56a6030284e44d1fa SHA-1: e96ac1f45ed7493ebf35aa9b73d979b316189b44 SHA-256: 928aec9680954d71261340ca0c50a018226bc9c929cebd576a391ab361f41859
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7787

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://corpusbg.com/files/fck/file/fevapufamopesoterut.pdf In PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/81428528004.pdfIn PDF document text
    • http://a-xian-coat.com/uploads//files/202108120410021493.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021071717452073499.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/rosafotas.pdfIn PDF document text
    • https://luminex.pl/upload/file/75190071479.pdfIn PDF document text
    • http://strihaci.cz/userfiles/file/gepuvefofurew.pdfIn PDF document text
    • http://bonsite.nl/phpcmsys/file/61734017172.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/35903509403.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/68374680938.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/datejilababigo.pdfIn PDF document text
    • http://findusafranchise.com/files/files/rowakedu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/24726d0b1e40a066445c0408ccc42ee5/89337257478.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/161131d7a3d891---kokavunavezaroxefes.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/cparee8penlvombdl1kskfcg37/lusojufijev.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/50042884405.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b43caf2c3bc---88872847884.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/c5aac2a88f9d5f012f20ad38e904a45b/50621650914.pdfIn PDF document text
    • https://mnlex.it/file/29426283964.pdfIn PDF document text
    • http://kgmda.com/upload/files/18727889715.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/valenuget.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/27776515154.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/34764440735.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607364e000570---34206141144.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/lobaxewowipudo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=download+the+curse+of+the+weeping+womanPDF link annotation

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