Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91177ad065ebfd6…

MALICIOUS

PDF

81.8 KB Created: 2021-09-03 22:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 62633dc59df8e154362522ca88e01bef SHA-1: 9850f42795c6e42bd4cd8b93edbb8b5556f785ae SHA-256: c91177ad065ebfd62199e46f8e9623b0f35bd1ec813f109e43223a7d79985208
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. It functions as a link farm, containing numerous URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5364

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://smidgel.ru/uplcv?utm_term=when+you+believe+choral+arrangement+pdf PDF link annotation
    • https://eccdc.org/application/webroot/userfiles/file/wanufivabilidoken.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e5d087f61---8136126171.pdfIn PDF document text
    • https://m3csrl.com/file/fagidemesodoxofagixajoga.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/81836461005.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/82591827969.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072da9ab435e---68118166482.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607978bcef5fa---bobomuvuze.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/xevimijawixototaz.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/manoxaxokur.pdfIn PDF document text
    • http://teraval.cz/res/file/88625848337.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/gonejonirozuko.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/gokovif.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/25187947428.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2db0818f8b---voduwijozufulajid.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/bapifunezamogegowoduf.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/354251508.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/bfa833390c3fab1a2a23e27ad81872be/petoniboka.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160afb0570368b---46259204478.pdfIn PDF document text
    • https://actor-conseil.com/files/file/fumobalamixakebolitekafo.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/50488173235.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d29efc901d057dd3a361af587568a7c6/15820471342.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/1d61uia4dhlc762d0joef34b76/29296133756.pdfIn PDF document text
    • http://vendingchat.ru/uploads/ckfinder/files/54200241353.pdfIn PDF document text

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