Malicious PDF — malware analysis report

Static analysis result for SHA-256 65fa1fedba6d5369…

MALICIOUS

PDF

64.0 KB Created: 2021-07-19 22:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: b3ec4deeb1e2b04e8f87b86e3abcfc71 SHA-1: df0ff8b5c2e75d86c1910e1f53e069444a31810e SHA-256: 65fa1fedba6d53696b3ac42f5bbd2b1d45de6ee39c263d2449cd9f6aea842ebf
154 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised CMS upload directories. The document body is unreadable, but the presence of numerous links suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6468

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://feniks9.ru/ckfinder/userfiles/files/jevanofotomakisenosono.pdf In PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16094d482a1d72---kokegaf.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcfc7a6b8b---5739349925.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/ruwopebarogolusotezor.pdfIn PDF document text
    • https://wecareprogram.org/images/file/62644531823.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/53439047199.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1803a2f30---69369304913.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16070521fbdbcc---77384587917.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/26282661137.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/75928986349.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/tafuka.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/lobukafejupomoli.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/vopawonefebiliv.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160909baa72056---59427080099.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/3774dd017be22290f3c9bc1a2939b20f/40308686182.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943cca4bdc4---78635495054.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/52849257182.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609d24aadb9be---98680499586.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/d97325f7b0dc6312ff9ddcd40ceeff4d/ximutuwo.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d8f3b1af2d5ef6584c566bf88e1818a8/35553560055.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/hodu3sqrcjo6tp69cuofjlvui7/9276842532.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b53e41a437e---nawojagulituxos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=one+smile+is+very+alluring+novel+english+pdfPDF link annotation

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