Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c99e4bc5afd78d…

MALICIOUS

PDF

75.5 KB Created: 2021-09-04 06:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e91a873932ef8c5e150bff70e21172d3 SHA-1: b8dcab58c0a0193a166576a5a1238f998c7aaf65 SHA-256: c2c99e4bc5afd78d50440b818a653244fc2b3009b8d1022e47b7f63e7dfe6c8a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV, indicating a phishing or trojan threat. Static analysis revealed numerous embedded URLs pointing to compromised WordPress sites and other potentially malicious domains, suggesting a link farm designed to redirect users to harmful content. The presence of PDF-specific heuristics related to link farms and external URIs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3274

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://pixomot.ru/uplcv?utm_term=la+pragmatique+pdf PDF link annotation
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160805d7ccaf20---7566337722.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/593404760.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/20631167913.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/situbiresasarowovigexe.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/56415165320.pdfIn PDF document text
    • http://beachhigh65.com/clients/879402/File/vaputut.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/77592676238.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/nuluvififowuzosi.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/72694125089.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/91621404366.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/xigazalitarewazekuxe.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/pej0j10amdrdp8q4fpia8m97f6/13297727527.pdfIn PDF document text
    • https://remont-bez-zabot.ru/files/file/novirur.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/eslh0j2s32vp1q3j8itrig5kp6/simisopexamitetako.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/mabizatetiluzagisilate.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/fopirixinazilofekotegix.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/ronubaludumetakijof.pdfIn PDF document text
    • http://njxinbell.com/upload/files/99117006653.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/sasixoka.pdfIn PDF document text
    • http://lnyy.cc/uploads/file/1629581576.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607b465381e4d---95301599087.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6bcdc8b11a---98656081620.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cde9729cba7---96687730320.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/b3b3d10d6c22988ccbf11a551bc4a57f/84840147717.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/9a07f28cef34d66ad13d72c368048198/32332651486.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0171127f4---62667074914.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/ponobiwafomukodidopolaw.pdfIn PDF document text

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