Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e49da035a9f39b2…

MALICIOUS

PDF

47.0 KB Created: 2021-05-12 10:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 64a2cf9fa15aea015e1cabae56303a1b SHA-1: 91f3852f03ed1c79f6779e6f150679c1163c1672 SHA-256: 3e49da035a9f39b28a5adaf43f1a38b47691f8731278f6f49f2d5d59eb63d6bb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of embedded URLs and the ML classifier's output strongly indicate a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7169

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 https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/9ddd1c51a9ebbf18be283f86018e7757/sonanarosidubarixobumaf.pdf In PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/e9c56b8b164455fc32192ce0884ae87a/70417298161.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/95657594505.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa8926e4c2---64572396713.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160914aefb22cb---purumovawuviba.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/tq38eljlluh51vcbbjbb61vdt0/82831505084.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/55675838891.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/7a7e0cee63ac906ebadf2839574a8bb6/8701314233.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070a707cb475---88910957296.pdfIn PDF document text
    • http://aimic.com/userfiles/file/xadokede.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8ab62720b---84840775388.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ff5c06ca4---nipem.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/50748443020.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/753fff6e1847fb5d36fee083475dac15/58672364122.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=have+has+worksheet+grade+6PDF link annotation

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