Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2cb9d81aefee591…

MALICIOUS

PDF

53.0 KB Created: 2021-09-20 14:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 853b9569534e9b78527b903cbc1d3a9f SHA-1: a6a09851039c8ceeff699a9aa89e50d2dd74d9cf SHA-256: e2cb9d81aefee591e48dfdd2be930aebb5a492debc2b36ebc8a8ac31e9b0d12f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs pointing to external domains, suggesting a phishing or malware distribution scheme. The PDF structure itself appears to be a link farm, designed to redirect users to a variety of potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8410

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://garglob.ru/uplcv?utm_term=how+to+write+sender+and+receiver+address+on+an+envelope PDF link annotation
    • http://candemdientu.com/Images_upload/files/fotiditusona.pdfIn PDF document text
    • https://billard-hauri.ch/userfiles/file/17004429670.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/25473848220.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/negobixapisanugofafu.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/werutejusibutefowik.pdfIn PDF document text
    • http://aeklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52817780674.pdfIn PDF document text
    • http://ashioke.com/images/library/File/namaxulewipud.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/64992024942.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/finibo.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/94325063492.pdfIn PDF document text
    • https://hlj-vibration.com/uploads/image/20210904/files/20210904141703.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/kodubogimegipiwix.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/23775739003.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16141eb84cf01f---65096150340.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/81483181476.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/43597686803.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b03ef153d7---25313692713.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/xijuzitisagur.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/genopesogifini.pdfIn PDF document text
    • http://cwesp.biz/upload/file/78886796710.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/zikoda.pdfIn PDF document text
    • https://regenerateacademy.com/file/kazediwomamitumet.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/80252317223.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/lufapewemugawibakiselatuw.pdfIn PDF document text
    • https://b2cdemo.tickets.com/content/files/majaderotumude.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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