Malicious PDF — malware analysis report

Static analysis result for SHA-256 261682a4926397ff…

MALICIOUS

PDF

69.3 KB Created: 2021-09-19 22:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e52ca870cc8919ee95eba047846af9af SHA-1: 7d74cbd12e96ab1a7218882b106bcb50ec1535cc SHA-256: 261682a4926397ff151fa9b9954d5ed41a10078604a0f87a667fcb240ec3800c
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, possibly to distribute malware or phish for credentials. While no scripts were directly extracted, the structure suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

Heuristics 3

  • 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://imssp.by/data/images/fxeditor/file/33640411958.pdf In PDF document text
    • http://tpdw.pl/userfiles/file/fudojabel.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/23979562498.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/42617746464.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/saxobedilomulonisajotarib.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcf9177adb---rujefe.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/dibejibuvod.pdfIn PDF document text
    • https://stvorki.ru/files/file/zoxadutikesuroto.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/95662995566.pdfIn PDF document text
    • http://thietbiantoanttk.com/uploads/files/wotemoladura.pdfIn PDF document text
    • http://gdgom.com/upload/file/210902110631610849m8b77zxdchej.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/7347325301.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/daxurapipumevuge.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/kuwub.pdfIn PDF document text
    • https://langumeistras.lt/i/File/luvimopoxukosi.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/xokagetogejojulozomewapab.pdfIn PDF document text
    • https://ixiu-23.com/uploads/files/202109190638002396.pdfIn PDF document text
    • https://knurussian.kr/DATA/upload/files/202109081855448860.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202109121824183308.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/lubawo.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///lopamexavivitifoxuloluku.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/ximuguratafitesufevabu.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/96079baa929fddc592a74e30ffe8a5f0/90475300766.pdfIn PDF document text
    • http://exteractif.fr/pictures/2/86537300147.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/80212445017.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=wwe+2k20+obb+file+download+for+androidPDF link annotation
    • 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_off0000c570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC570 18092 bytes
SHA-256: 31323a486ffdeb9878a8d1876769e487e5e7773484a5ffe72cbdff9367547261
font_01_sfnt_off0000f497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 10632 bytes
SHA-256: e935ada24865a908ba3389ded7b7c8274e65fcd031982fd512648df296550194

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