Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3d7fe4b45fb84c…

MALICIOUS

PDF

89.9 KB Created: 2021-07-21 06:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1ffe6c0709d753994bb73bacf77c027b SHA-1: d236a68d0ef825368113b3d92499d17da0b6f5c5 SHA-256: ee3d7fe4b45fb84c67080da0e42ae211163cab4d6a570b6c8dbd0f0fe539b2c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to potentially compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dj-venci.com/uploads/pages/files/semotinonewu.pdf In PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1d7fd8ad3---54011006913.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/7f09aa45bb0830b13e02be365674cc75/32767355857.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/tamagevevelazafexur.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/7a3cc7529354d142b023ea14bef1da99/kulikinezaxejiti.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210625_053017_4749.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/679ddaebce6ea549d7f80541f775edb9/nirubagalatenirinomaliz.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/3slib4q02qgl1lvsruhav2nfu3/logulixa.pdfIn PDF document text
    • http://18554080.com/userfiles/file/31634000882.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/592097506.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/lonuxataneluvubopogo.pdfIn PDF document text
    • https://digireg.ch/upload/3625436758.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae281ee2baa---woratimaseba.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/guzikova.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/47867735131.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/lugapigekefadaref.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32ae5cdc1d---nipero.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/lupowilegamuwekasokiz.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zuponuduzazorukobir.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/98424742854.pdfIn PDF document text
    • https://basisnomor.com/contents//files/dunixexotojiju.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/95023429881.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/61244378595.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/71027268889.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/630f44d10dcce4c08c47c69fd7b3d7c1.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=college+counselling+pdfPDF 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_off0000ffb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000117c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C9 10564 bytes
SHA-256: 0d84bfecfc09ed263f11416bacbaf3af706da72836b8f350a191be40c464b145
font_02_sfnt_off00012fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC7 16480 bytes
SHA-256: dd6fe5712f986cb4f54265f72192a38b151e6e8b94e66ae0222fa73016acc48b

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