Malicious PDF — malware analysis report

Static analysis result for SHA-256 097eb29a33a2e73f…

MALICIOUS

PDF

70.3 KB Created: 2021-09-28 06:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: ccace892c673d162f2a94316461dd1b6 SHA-1: 380d0ad0c756f808e96cb170b0c402b8ef8a2698 SHA-256: 097eb29a33a2e73f7a7bbd7e2e30e6336e1b752d24d2e2e61e86defd45b1b92f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://philabc.ru/uplcv?utm_term=rick+and+morty+season+5+gomovies PDF link annotation
    • http://straps.by/ckfinder/userfiles/files/85232509197.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/xipovabomu.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/takiwe.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210920_8C822A4B00A606B4.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/zolon.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/63227434204.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/nupajopadifobunenugotugix.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/vozawikuboxapinin.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/bomamurazufemigoro.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/dovafeselatopogifokiwisiz.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/45864667635.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/fuzitovalaw.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/fisavefakomovojepagixe.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/86641755438.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/subobuxuwetakamowif.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/69138516515.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/botuwakutanepavado.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/63145120057.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613c937467c9e---purajinizof.pdfIn PDF document text
    • https://inarsindbari.org/uploads/53690918777.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/83411884743.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/nalulo.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/gefaminelibobixi.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/vakojaxokuwepamidoxu.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/34593972642.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2ED 14460 bytes
SHA-256: cf3d0e4eae05139ffc244c8290c2f019bda8c60e9cf55d7eecbd1ff3c092c71b
font_01_sfnt_off0000d72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 11116 bytes
SHA-256: 1d6780186ceb87940be928f141859773ee5f2f99ecec3c3e4e0ad47f173dca66