Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eee9faee79cf7cb…

MALICIOUS

PDF

70.3 KB Created: 2021-09-27 10:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ed2fda9475a990d8bd6d03244d819a56 SHA-1: 412dae7b0852b0f30201e8e9f9a849d1afb0a321 SHA-256: 3eee9faee79cf7cbdf0c4920fc49f01f85b07d59d94b5950c72281f9b3ae597d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

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://archism.ru/uplcv?utm_term=the+great+gatsby+chapter+pdf PDF link annotation
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/palulosuloxesuve.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/35262274579.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/93155930345.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/77136429952.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/60806995539.pdfIn PDF document text
    • https://kingbakerypans.com/userfiles/file/18065041466.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/15721045254.pdfIn PDF document text
    • http://tainghe.vn/userfiles/file/kanemegifawemekizod.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/varosewu.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/rasupo.pdfIn PDF document text
    • http://dataprint.ie/uploads/file/kebakitidesebemonuni.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/xudugesa.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/toridige.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/puwakomita.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/82940914327.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404aa13b11b---tuzanujoratubonugodeg.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/zigukiwojopuragoxu.pdfIn PDF document text
    • http://csc-vietnam.vn/uploads/userfiles/file/5091066791.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/45567600714.pdfIn PDF document text
    • https://magnanelli.com/userfiles/file/jonuk.pdfIn PDF document text
    • http://fmdscu.net/userfiles/file/didoniridafefinok.pdfIn PDF document text
    • http://hanahana.vn/media/ftp/file/23264764942.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/busetoneviriwonetinubafus.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143c965e3884---jodokonelaxajetedale.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_off0000b37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB37C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8E 15484 bytes
SHA-256: bcde989a7763cd00275ac6af430849825982d5dd36dc94235294a1cd6a10992d
font_02_sfnt_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 10756 bytes
SHA-256: 21f3290b2344d695d91f8e9f8c20cb24e74bc843efee1525ff20599f8ebb2ecb