Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed20d48f8598280…

MALICIOUS

PDF

84.8 KB Created: 2021-09-16 02:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3fa6248269df4ef4803ffe97950fb3e0 SHA-1: d01fcd577a6aa9088ea2758e0a804aa783e5af79 SHA-256: 9ed20d48f8598280b18e9f76be5c1bb0421f05428d31ce4d776d53074fc80bfd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://allytemp.ru/uplcv?utm_term=soundcloud+app+for+android PDF link annotation
    • http://bangladeshceramicsociety.com/uploads/editor/files/50100180690.pdfIn PDF document text
    • http://irollee.com/userfiles/file/88679280703.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/6c26bbcaf6a32153b0ee4475f82222d4/57670141492.pdfIn PDF document text
    • http://zonwering-belgie.be/ckfinder/userfiles/files/76504251826.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/c2d72eaf7ac4c570e881d846e28e2bac/51378576905.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81648113356.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/nakudenabarem.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/bb0aba21ebabf6d01f6bbcf6f821349a/konomiw.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/tinikupovo.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614173bbbfc40---7414049499.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/donoduge.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/jegamipun.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/kasutodak.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/e5a25fc5f9e7e87fdb0f984ddf789e52/60998000904.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210901221150.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/jakila.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/girotajofakogufi.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/javojepukuwukoviviwede.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/46775403909.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/tominezes.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342e880303d---parig.pdfIn PDF document text
    • http://topbondtape.com/uploadss/file/rulibapowoxem.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_off0000e6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 10392 bytes
SHA-256: 2a5612864adf1e25607d38e6b892bb1383d1299bfab927ed9d1a8b7f281f3f2b
font_02_sfnt_off0001165f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165F 18292 bytes
SHA-256: a2a935ee2ac227ca0d23f64f1c5cb2a248648760caad0929519236adf6fc7798

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