Malicious PDF — malware analysis report

Static analysis result for SHA-256 9859a0b250feae47…

MALICIOUS

PDF

43.7 KB Created: 2021-09-07 07:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 909267d0e23d28e80353e082d5d5c5e0 SHA-1: 333be89b8f038930fbdf9514ca7d91201bfc03dd SHA-256: 9859a0b250feae476629e036c597f7537cefb71290bb1b1d2721c51bb2b7561e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to domains that appear to be hosting PDF files, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7152

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://csc0451.com/userfiles/file/20210822123104_3ggs89.pdf In PDF document text
    • http://mousike.it/img_ins/files/timosadipanizowor.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/fafuxutaxotoviropadufo.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/bubugejofixetikodebasug.pdfIn PDF document text
    • https://eetravel.net/file/ribito.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/1369d789501379a0526a0eb7378406ab/vatama.pdfIn PDF document text
    • http://edgecs.net/documents/48857601274.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/mejuvexutofog.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/71616993847.pdfIn PDF document text
    • http://thy-environment.com/userfiles/files/warigopeduger.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b37bf715b0---numovu.pdfIn PDF document text
    • http://stolocatering.ca/clients/874514/File/novulawolediwuturipep.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/ed95cf9372bfa786702dca4c836bd12a/90923099442.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/43566776259.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/cbh7vpgk1bkb6c744tfmv1f3e0/34508066301.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/80241763981.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161163c6be5dd7---26741731223.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609416740e5bc---44570888331.pdfIn PDF document text
    • https://auto826.com/uploads/files/xivinojewexit.pdfIn PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/votizevirefe.pdfIn PDF document text
    • http://amandamaitland.com/images/file/xeras.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/91e2676ff6b96f81aa61a2ca4ce52108/zafesosepawutoza.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/2q474mtqi7lvbf5gmc5eift1fk/27494205489.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/1619004163.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=pop+up+house+card+template+pdfPDF link annotation

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