Malicious PDF — malware analysis report

Static analysis result for SHA-256 35aa03401404ca73…

MALICIOUS

PDF

59.8 KB Created: 2021-08-14 16:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a37a3cc9d405047fc3449382587b9fe2 SHA-1: 63f34ec368e47b20d2c58c51df589350499db505 SHA-256: 35aa03401404ca7367af04085c41201905527705d8a2623e24da4af1def10777
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, and it contains numerous embedded URLs. Several of these URLs point to compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8763

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://oniceh.ru/uplcv?utm_term=cinderella+and+four+knights+ep+14+eng+sub+facebook PDF link annotation
    • http://kccmaul.com/files/files/69549416421.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/60087301073.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/kemapodunizoraz.pdfIn PDF document text
    • https://advertisementnepal.com/ckfinder/userfiles/files/kobovozurafop.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/dfmamis673kuirfgk9fleb7fsf/85395653198.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/79279020858.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/gobafumidon.pdfIn PDF document text
    • http://www.siposferenc.hu/html/74068282619.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/6060500802.pdfIn PDF document text
    • https://dp-silver.com/userfiles/file/94983866543.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/47128304514.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/93014152457.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/83604762024.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f774dd45cd---merumumebipiwesefoguj.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/615g4v1av6ujtsd3e55l3abopj/96937097363.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/notiwifipesakizegasake.pdfIn PDF document text
    • https://xistenze.com/files/files/45645550481.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cb46fa4d32f---lepun.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fd2498ec0---69605417293.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/27209111416.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/26500826946.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/678ffcc0b3c3931f2c9eb13534aab107/rilewudesiji.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/12957570806.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/kewinizoxopaluteke.pdfIn PDF document text

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