Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7c7df901303b1b…

MALICIOUS

PDF

60.1 KB Created: 2021-08-05 02:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 67bbed086884ec3e53f89ab8e0e902c8 SHA-1: 91dbb4d723a29afd0814963e21202cac294c6716 SHA-256: 4f7c7df901303b1bd4a346dcadc77de5080695049b3a2252a117a4c7b7802eb6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on compromised CMS uploads and disposable domains. While no scripts were explicitly extracted, the nature of PDF link farms often involves embedding JavaScript to facilitate redirection or exploit vulnerabilities, hence the inclusion of T1059.007. The primary attack pattern appears to be luring users to external sites, consistent with phishing or malware distribution, making T1566.001 relevant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8982

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://binarbaidfabrication.com/public_html/userfiles/file/bipeduvufesulitutower.pdf In PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0ff23e034---polupimurototozofifela.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608445d47859f---nibipafotuzarewod.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/7nuko31mfbvegu70obuddd5ue4/53479092141.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/40cfcedb283fbcc175ca550e5a5346fa/57068646352.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/76206259959.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/8uei1o0noqh9ragb343e8mjmjl/1714257094.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/dc50a14641d75ac624d9ef3ac7464acc/61146273969.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086b361b27c4---tomut.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/112e92f72277c8bf1a4a90f6754b1020/81134198723.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/d375a05s03ar7cacp6rsvr6jim/gesofolonofibegufudof.pdfIn PDF document text
    • https://ancoraeducacion.com/images/naxixuxadawa.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/jitujewu.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/41633875023.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/gogewurolu.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/66700186928.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/vedab.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/nasajojiwopeko.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/22935261358.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/dalexobi.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16083577418a30---dilutadisesibagudafinis.pdfIn PDF document text
    • https://lojaortigas.com/ckfinder/files/66592523647.pdfIn PDF document text
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/23949931222.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/tulozaborafut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=ali+kundilli+2+full+izle+1080pPDF link annotation
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/boruwepefigabuwapoweb.pdfIn PDF document text

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