Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e61f79eb08292f…

MALICIOUS

PDF

66.8 KB Created: 2021-09-25 16:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: ea0efaf3bf2fbe966a27890143370b0d SHA-1: 021b95676acd4d6d1c8c2c985fa2479e386803a4 SHA-256: 84e61f79eb08292fa629d3798423aca0488ca3418befeeda0a0d0a9ccf34a377
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://allytemp.ru/uplcv?utm_term=beach+buggy+racing+2+hack+mod+apk+download PDF link annotation
    • http://zespolbahamas.pl/zdjecia/file/96831220637.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614192ef3e6ce---lugutomufexukefo.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/sijetit.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/jomujavapazojaz.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/48150922413.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/kilupumasanugukikopon.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/079cln9apoio2o65j3kna28df2/sipigojedolebezetur.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/21980563687.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20219251846429278.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/52784602573.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/zinaniwavilefefodifaj.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/fukut.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/73581716350.pdfIn PDF document text
    • http://wawa757.com/uploads/files/56684716607.pdfIn PDF document text
    • https://fong-cai.com/upload/files/towadetoxesewirojilug.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/naturuzefabudafakotanu.pdfIn PDF document text
    • http://movediary.com/userfiles/file/16250991616.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/kuzagasirabobixonud.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/mubezifibadizul.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/24660213566.pdfIn PDF document text
    • http://htbestcomputer.com/media/ftp/file/jisuwowakodizonisewevevok.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/rabuzegukometuri.pdfIn PDF document text
    • http://dakov.hu/_user/file/lulurenanovamit.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D2 11400 bytes
SHA-256: 7e846c408567434da421dc735914412b7620e4ebc2ab9213742a0ce827fb262e
font_01_sfnt_off0000cc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2C 17180 bytes
SHA-256: 325d8526a998554604a7d145492c06393933f906c2c9804d10b3a16084d85e31

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