Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9689c462439970…

MALICIOUS

PDF

69.8 KB Created: 2021-09-18 00:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 817d75daac676cd60b282ab02cd89de2 SHA-1: e446bc84f982c959218a8948eda5d45197991376 SHA-256: 9f9689c462439970ced399959f3b08f95a8db4b7265f11f5869986a1479aa0b5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it's a link farm designed to direct users to multiple other PDF files. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://capital96.com/userfiles/file/98259156558.pdf In PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/26897360755.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/jijeke.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/perabixoxomerip.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/47470521226.pdfIn PDF document text
    • https://sledovani.gpshlidac.cz/www/userfiles/files/59033159278.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/dizuvosifudebe.pdfIn PDF document text
    • http://www.puhito.hu/uploads/81727844626.pdfIn PDF document text
    • http://vizcsap.hu/files/file/sidefufuparosogutuzek.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/vugowavolupomebawudelepe.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/37754277064.pdfIn PDF document text
    • https://medbioplast.com/klucharnet/images/file/27419144644.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/buposubidiseb.pdfIn PDF document text
    • http://reichspfarrer.sk/file/xisanelimalasufe.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/fideselobumixu.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/xuwakisamididanoparej.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/bezesuseb.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/mudikigupur.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/jazujipesi.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/vozuginitojuvutuf.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/rurakunob.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab9f74689e---87487211506.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/gawizologufinazenugun.pdfIn PDF document text
    • https://hsse.cl/files/12066077189.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/851ffa7665b24b7e0f2e97e3561aee82/suwibuzizelopam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=clash+of+clans+version+downloadPDF link annotation
    • 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_off0000b240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB240 10656 bytes
SHA-256: 92865ee04c27554dc00a973e362cf71b3e1146ad4091cefe8978ffc49a382d2b
font_01_sfnt_off0000caa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA2 15460 bytes
SHA-256: 1dc62aa09c11fe23491799164ba08607cab732df988e692f348c260deb40189b
font_02_sfnt_off0000f1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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