Malicious PDF — malware analysis report

Static analysis result for SHA-256 08690d8d7218f765…

MALICIOUS

PDF

67.9 KB Created: 2021-07-21 23:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: df4867bcd9783006061adc452b09131f SHA-1: 1ab8c7a7eb270e75a0f019b55c5338e80a47449d SHA-256: 08690d8d7218f76593953c97ab77c491169ff5317e092d5d6da0684c2ce863e7
154 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous URLs pointing to compromised CMS uploads, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further compromise. No scripts were extracted, and the document body was unreadable, so the primary indicators are the embedded URLs and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9552

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://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/vneasc13vuk11quo2gek86umb2/nerokigeruposubir.pdf In PDF document text
    • http://sam-global.info/files/file/zuzolopokifajosopebuja.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/21736139697.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608948ea0792d---fedevesawezaguxibonos.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9af1adbead---zopurukuvulixekefironuwa.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/83602835244.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d27e8361bff16fcd9a28ec11bcada901/29572251717.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609faa418e8c9---28097421370.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b294ac27db---1881201832.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/ba387e4338277b1b77baa7d39a3b146e/76282090770.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/matoluxel.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f0896c4f389c908749db56411513b57c/56911290431.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6977927ddb---5750940486.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/36863605781.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/e3ko6tg5akhp1sbrlf0cup0a2e/rupagixunukaveraka.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/sizofirowe.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/00f89186b46cef7203b88b17aa092ba8/sirexenodukawanaxumo.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f33f866be81---67187260313.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/23461a3e4251dbedd830212e57544138/83270072906.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b91f26aa429---47050366548.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/14148603922.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609629b66690a---futuwojuvanaguwadowoj.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/c5750d8115ad51f8a828e820366a7109/60628116145.pdfIn PDF document text
    • http://vivalepurrexotics.com/clients/2/2f/2f65fe2011b8f0b07f64c29a74835a02/File/81409603335.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=sunflower+seeds+and+cholesterolPDF link annotation

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