Malicious PDF — malware analysis report

Static analysis result for SHA-256 647160657d274d98…

MALICIOUS

PDF

63.8 KB Created: 2021-09-09 19:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0482739863364b7625ed163f2caf70e5 SHA-1: 9e499c075aeb1a0b1fbc5673ecec54e7dab38788 SHA-256: 647160657d274d980e01d31793afe0a4a8fda4f49ac4dc50f30a826f41299193
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially malicious or phishing sites, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3846

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://insureavisitor.com/userfiles/file/josufilavabomuva.pdf In PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139bcc9b4196---20726962826.pdfIn PDF document text
    • http://way-of-spirit.ru/upload/file/gubawi.pdfIn PDF document text
    • http://giteduguedesboires.fr/userfiles/file/92041811536.pdfIn PDF document text
    • http://www.buildonhope.org/file/42430681410.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/mamiduniwikexusowin.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/5835076526.pdfIn PDF document text
    • http://iccjsc.vn/images/uploads/files/75233784451.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/tumotokakip.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/maraji.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c9e20b07c---gozoworewikosamonigeg.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/dulalefugaveg.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/1133985243.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/75133838976.pdfIn PDF document text
    • http://lawngo.net/fckfiles/10048085826.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/621122669.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/zusutowilewomimedav.pdfIn PDF document text
    • http://htygroup.com/upload/files/99675285251.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/nosomifirorene.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-06/210906235432595889vlz7sae8yxhe.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/52123209764.pdfIn PDF document text
    • https://ms01bet.net/contents/files/xaguvagapus.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109030016595234.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/wewifipedufidu.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/44092473825.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021090601481853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=keywords+everywhere+chrome+extension+alternativePDF link annotation

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