Malicious PDF — malware analysis report

Static analysis result for SHA-256 32cb240eccb13510…

MALICIOUS

PDF

80.4 KB Created: 2021-10-31 03:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3367739f3d633c4719f7d82c9e3fd55f SHA-1: 3dc5dc1c4c4a50877044cfcd0fa32717b8fe7eb5 SHA-256: 32cb240eccb13510c6c607efd5191250d6fe90481fa06f02c688163f9892b3d2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a tactic often used for phishing or distributing further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6387

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mwbright.com/upload_fck/file/2021-9-6/20210906151811629952.pdf In PDF document text
    • https://negaratoto.com/contents/files/labopomilivanumive.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/dabiwariwojiwexupepabis.pdfIn PDF document text
    • https://miet.hu/kepek/fovedijejogezalovajujemek.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/jopagonuvigesabe.pdfIn PDF document text
    • https://portalkucharski.pl/app/webroot/media/files/80755360550.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/ziwuvutejesofekuta.pdfIn PDF document text
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43232781981.pdfIn PDF document text
    • http://jonme.net/ckupload/files/11534056404.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/zapositegikodusijowona.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/77483230758.pdfIn PDF document text
    • http://fairfresh.net/assets/admin/ckeditorimage/files/jopirefevunixoj.pdfIn PDF document text
    • http://icareonline.net.au/ckfinder/icare/files/28029673842.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/59447234504.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/63248215318.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/47997338875.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/korekuve.pdfIn PDF document text
    • http://ux-school.ru/files/files/86330346959.pdfIn PDF document text
    • http://asid.rw/userfiles/file/20247448308.pdfIn PDF document text
    • http://wedding-box100.com/uploads/files/202110171518191153.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/37865307225.pdfIn PDF document text
    • http://advairtech.eu/assets/userfiles/file/pupomolefafitolavuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/HKUGBsJGI0E/uplcv?utm_term=another+word+for+catering+to+someone%27s+needsPDF link annotation

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