Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bed37a9aa6c0d9f…

MALICIOUS

PDF

90.0 KB Created: 2021-07-17 23:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3c1fce3effe693d2de694431ac4098be SHA-1: f040a5c66c558a8276458da07790d4f10f8faae8 SHA-256: 5bed37a9aa6c0d9f60d2bd7d38ba12de647bdd987ae5e08538c4c39eeef3b1cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm intended to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/c035cc82fb5063a8b922be5c3f705c9c/85025624901.pdf In PDF document text
    • https://gulfb2b.com/userfiles/file/zezefobawawejamelavumerik.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/wuzobunukifujeg.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/2cae8ef42216e90dd681eaabaf1ad49a/35783577800.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/47e9d93b07cf4dfa71e8b15abb1cb1f4/93480356557.pdfIn PDF document text
    • http://aceranalitik.com/ckfinder/userfiles/files/wategetaxijogexavifuv.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/gevarukal.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/gjmhupjk25h3rdbo6jrde8mt0a/xigivadaruwetidesorowe.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/d6de460865d290ae73cc0dace31511ed/pulabixadapedafevixev.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab85bc84cc1---45039435973.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/he8fc4ft5r2kpdicp5p6tq1co4/94945104446.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/46624779044.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/69067122211.pdfIn PDF document text
    • http://bdn10.cz/files/file/44826354126.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/e9c89e90d58285327d160bf8a16369c7/79632917690.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/60770178032.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/12051262371.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891ba131929---tanidozerube.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b86f7ab3337---vidata.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/4435986467.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/rilawuvuxesi.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/39885259424.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/ee8d1c2f7e2057cb61b4e9519a687bc7/73934457668.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8dca320b5---winedunarola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=world+1+toad+housePDF 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_off0000fdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC7 17456 bytes
SHA-256: 8a62083edbe123cc9cda0e176eff0f217a7e5abb1a2b9b0da7f12a0a77c8d905
font_01_sfnt_off00012b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14373 10296 bytes
SHA-256: 6313cf64d6990818c9196c9450e48ee0b78bece69be323e4002f54e81f66b23f

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