Malicious PDF — malware analysis report

Static analysis result for SHA-256 46179c20db8206d7…

MALICIOUS

PDF

85.7 KB Created: 2021-06-26 05:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ce0bcc36bfaa42d449bfa620a84a405f SHA-1: 6fdf7e4f123ab1a7446a55a64c921f44b641927b SHA-256: 46179c20db8206d7fd13769d7e14943aac0f76fd8f2e96efc2cbf0e76b58d1ce
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The presence of multiple links on potentially compromised domains suggests a phishing or credential harvesting attempt, possibly to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608301c8dc044---fulijasuxovidizosuzop.pdf In PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/co26lh10ivsqvpj83b0egv25iv/78550234006.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/307d30a3b46e29dfc623159c6695f8fc/56246556465.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/97678687346.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607814655eb68---78630977454.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/vuxepavisivubikidulup.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09aa5d76e6---77755033809.pdfIn PDF document text
    • http://93564497.com/userfiles/95272540520.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/9ojps4dbkbavfba3t9ef5e5jg0/nobibefugomoranusoxotesu.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/7994717235.pdfIn PDF document text
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/jakag.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160accf77101b1---levurubujegipafiwal.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/eoa8hlfbvi5nrndjj2466fdkib/dasuvuxulusekujabat.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/49201242997.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/pojubasobotupefifegi.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b997431211---36336790816.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/da572d1b7698a5979ead48862a266163/lovifata.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/beb231512dcc3107c7b717595122a7c2/51337189796.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/b6dab7c97a03b7f465b8c5c8fa4e42dc/kovuvokukuponuzija.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078324d49e16---55098796767.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/2f7fd90cceddda7e0658170cc65739d5/lowagesurivedevu.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/falolimufafikolag.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8df06832ea---juwoberorunizifozovo.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/5e0c68839af2dc2367aa9cf2b878853e/buvelomuguxitaxazaxef.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c86c933d344---92959175513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+make+pdf+non+editable+without+password+protectedPDF 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_off0000e9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B2 11296 bytes
SHA-256: 420c53759c29722fc37c1940efad379e8e468a241f296d89bcf3042fe0f228c7
font_01_sfnt_off000103c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C9 17224 bytes
SHA-256: 855e0792a8193496f8d153d98dc5f10b493ea4237d98fa2181ca6156fb09d94d
font_02_sfnt_off0001308b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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