Malicious PDF — malware analysis report

Static analysis result for SHA-256 0569227fa39c4569…

MALICIOUS

PDF

63.6 KB Created: 2021-09-12 15:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 61c6b59138851a00ab6126c141d03598 SHA-1: ac25a3accdb288066f39b5f0385862270c919cdc SHA-256: 0569227fa39c4569f908be43ee0806584f048d3702d2eb222ca7aa9108c1d65b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious domains and are structured as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the true destination by using many distinct hosts. While no scripts were explicitly extracted, the nature of the embedded URLs and the link farm structure suggests the document is designed to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8048

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 http://engroupe.ca/aym_image/files/36246621731.pdf In PDF document text
    • https://imihwa.com/uploads/image/20210902/files/20210902215107.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/jureniz.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/11439353558.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7305d595b---27765226651.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/rudebitajekuzimewoxirezu.pdfIn PDF document text
    • http://winso.tw/userfiles/file/rumugebonowabigerumererel.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/nadasosoxapixuren.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/744297692015cbed44439e9176bafe9e/30523285180.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/11332541910.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/40968693869.pdfIn PDF document text
    • http://chernogolovka.inhome360.ru/admin/ckfinder/userfiles/files/tedilelulifizoma.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/puzutalofi.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/rofij.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210909072752_075nil.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/26230778911.pdfIn PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/gabirisupojigi.pdfIn PDF document text
    • http://vibrobreaker.com/files/files/42909533984.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/kubapavamefoxusakuxagew.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/dakuzolupib.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210902_EECA502D4045BC7D.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/mapitazinuwosugumibumati.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=free+backup+software+for+android+phone+to+pcPDF link annotation
    • 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_off0000e1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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