Malicious PDF — malware analysis report

Static analysis result for SHA-256 479e735d11ce1ca3…

MALICIOUS

PDF

62.9 KB Created: 2021-09-03 02:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8ad2bea2e0319fd043c046598b03404b SHA-1: 33fc011a5a8c8634dfe265f1c4833e5b76b41ad9 SHA-256: 479e735d11ce1ca3770966f38e36a71c742c443bd57b31f0c3d003667abbc834
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload storage, likely to host malicious content or redirect users to phishing sites. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6077

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://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b71fa6b64c---xamis.pdf In PDF document text
    • https://raptiherbal.com/ckfinder/userfiles/files/58895877908.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093025c48ba7---gozasazulafiziligekazige.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/26094990560.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c686687b5a---mixazuwoxebujufim.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/45876328075.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ge4v8e42mfi3phmre76shkvp6m/97289371301.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021571244168030.pdfIn PDF document text
    • http://study4student.com/cache/fck_files/file/wixetujosufiwebejemi.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072546fa3bb7---80645156721.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/56691919682.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/2366f6a146f78487d8e6a9fada6de116/togobaduwiju.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160edfc503867d---tawitewixuxiwisoniladonik.pdfIn PDF document text
    • http://deborahbrown.us/clients/860103/File/48259512175.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/b12f150b5d3c9f4ab0b0645d98fe5e1a/58540345976.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160f499f2c96ac---vajezewukov.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/63952a8f7f5c5b94887d3c049c20a60a/43745792038.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e5f674dafa2---pevimirugifob.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075557888ff3---3800822873.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/61867037804.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/161113f1ddcb61---fatesoju.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/40601062242.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/crf33v60nji7f6fft996g63nho/7135510233.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=kinfolk+magazine+pdf+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8CPDF link annotation

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