Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe53d9b3e1e4cc5b…

MALICIOUS

PDF

56.2 KB Created: 2021-09-03 02:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9e02d8e43f26a608181289d7f116dfe6 SHA-1: 60885100f70dcfbf93823dbcd8fb1a3447c86e92 SHA-256: fe53d9b3e1e4cc5bae9c7404d239e2cad3560337d5330b6573ff39cb9d99331b
154 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating it's a phishing or trojan PDF. It contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The PDF's structure and the presence of multiple links on potentially disposable hosting further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5455

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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