Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7cf0c81940bbbb…

MALICIOUS

PDF

67.8 KB Created: 2021-06-27 21:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d9f749134490411e081f67ac65768c71 SHA-1: 992c5c56103bd0f6d6cb0c69ae1e46fd9977a0f9 SHA-256: 3f7cf0c81940bbbbde7ad275cd8ceb8e7dc7d86190a3162cff3ad5d337298895
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as a malicious PDF by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to external websites. Several of these URLs are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5526

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://queure.ru/uplcv?utm_term=america+says+answers PDF link annotation
    • https://nepalimodelagency.com/userfiles/file/29480620791.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/qcbv7r42u22j53gvkaq5r70rlc/55849496441.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/ravadidemodor.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c4a4db1bd---lamaxinaju.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/bimadobuneves.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606eca95a52cd---fukikisati.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2497de701---83997781283.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3da0d14b8---304973930.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/moxumegaza.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/7589fd639e318ba7100c1e1f38af2119/78887914348.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-4/20210504211838444120.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/85974935112.pdfIn PDF document text
    • https://fallsplat.se/file/99551835917.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16092fbbc7f409---24485015750.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/57019674685.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/49687674602.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/vpppp4ld5seomqunv35mnhq7t8/fokok.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084cc2ece2d0---11207000182.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a081a6ac521---kupuruxel.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/tasegodiwafox.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/75327880212.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/1eb353nh86l72hchdhnnva5euh/91350829094.pdfIn PDF document text
    • https://hostingyuvasi.com/calisma2/files/uploads/besesopotided.pdfIn PDF document text

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