Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb60c9786688ab46…

MALICIOUS

PDF

72.1 KB Created: 2021-09-17 21:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 25854766c17c0229013a39974d22d247 SHA-1: 4a7640fa51e424d7afbd7c3cc7903b08c8b57191 SHA-256: bb60c9786688ab460876ae1b0a130cf85a4e8d274c5f88467ff1009cbed2234b
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to disposable domains, indicating a link farm designed to host malicious files or redirect users to phishing sites. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and numerous embedded URLs suggest an attempt to lure users to malicious content, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 4

  • 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://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a336dc912a---vazunudixurepubozizelap.pdf In PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/tinojikuzupevivuba.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202109131918378267.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/21999171683.pdfIn PDF document text
    • https://oasis-travel.ro/files/13982527758.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/90365707598.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/55342405019.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210902015151.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/pukewanelulerikuvifuxi.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/79996988114.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/rakedabuja.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/55187948326.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/sosozuverotageraj.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161363196b3fad---sudinomosevimuw.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/27205130762.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/ninanina.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/dujokidilasumorolumiju.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/31478363772.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/77312746713.pdfIn PDF document text
    • http://sial.pl/galeria/file/12537981642.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/11372038964.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/9810385765.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/71981944977.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=torrent+file+downloader+for+androidPDF 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_off0000b7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFC 17228 bytes
SHA-256: 0a7e19798b12a0a758ada34b81affba11d08a942355a9d69b60975cc870bb983
font_02_sfnt_off0000fc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1D 10228 bytes
SHA-256: 9981f908f994f71ff4e34c5a4e671b0a397a17e7b8a491ec68d46763762d444b

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