Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb969a2275af1aa1…

MALICIOUS

PDF

63.4 KB Created: 2021-09-24 00:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ffbf3c767c8cc65acb9168c9ee381b73 SHA-1: e86e41107d760030323e045797774541d5c54515 SHA-256: cb969a2275af1aa1870444066c5afbc7703b27d86c86c463c01c1aac5d6ba559
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV with the signature Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0. Static analysis revealed that the PDF contains a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting. These links are likely intended to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3819

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 http://vasekurzy.cz/userfiles/file/88352304750.pdf In PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/jofaxomizonufiwegagam.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/86106654700.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/80925744541.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/kuvalepas.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/sopovevixumuvesuzuzulime.pdfIn PDF document text
    • http://www.flamanville-76.fr/upload/file/demujiwup.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/32000377838.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/nesijomuvaxaxobumovo.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/735bc7616643b50ffbcd01a0c6a0ae71/pofavameponawop.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614408ef90825---walurumizud.pdfIn PDF document text
    • http://baoveantam.org/upload/files/nimugexufavuto.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/kadepixa.pdfIn PDF document text
    • https://intersensor.ro/v2011/Files/fck_upload/file/kagutolejala.pdfIn PDF document text
    • http://lulanjina.net/upload/files/15701675094.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/29425526835.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/danupedamajaravuk.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/88756021719.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/30724740867.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/34203107374.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2342c234a---86377074944.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/66027464346.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/pugajutidifewigizemepaz.pdfIn PDF document text
    • http://viorina-deko.com/images/file/54654610819.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/55463374487.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/e2e35e2e3b3b7bab65d4a266e5c21b41/19362403409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=classification+of+elements+into+metals+nonmetals+and+metalloidsPDF link annotation

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