Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29b2efde8075e18…

MALICIOUS

PDF

84.4 KB Created: 2021-07-17 18:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d761a86a4c469c12241a612089fb543 SHA-1: 5d90f227fcb535cd86641f3a80667e9b273b3fd8 SHA-256: f29b2efde8075e181c03feb879db25cd5f43977804990c0ac9c73b6528238d96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99e305acc9---sawunodutobovuxenizedatuz.pdf
    • http://diakmelo.hu/ckfinder/userfiles/files/fuxuxulujof.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fe1b35a2f---9294534099.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a5836f16e---20661181800.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/ddc3fba9488f5dfddcaaf0d216008267/8638329299.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/31ee694c6e28ff17cba6e9487a90ef1b/gonovowilifexori.pdf
    • http://nguyenthaotech.com/upload/files/tened.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a19a09ae45a---32384018394.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/c5b4c1026d2f0576575865a2658aa63a/81875526064.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086c3d34a736---34297141442.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c718499c7---gatovirovub.pdf
    • http://olimpic.hu/ckfinder/userfiles/files/20135831211.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8004a90222---15832850911.pdf
    • https://burgas-remonti.com/userfiles/file/padezilusifalorulegaruzob.pdf
    • http://csc010.com/userfiles/file/20210614130930_l3luyv.pdf
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/notuvowukugodosuma.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608190140b4d9---lananibozez.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/57464b2cf3f3168f99df171d418846ed/timinapinizunujogerop.pdf
    • http://www.mezmat.ru/ckfinder/userfiles/files/83147390986.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d469a3d615c---85104810695.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca405c6bd5---dejezop.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c44010ceb---begosoxuginozopuwobilifoj.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4af3ba044---donesojedebelofi.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f40ea78237---balizebagikofexenafipi.pdf
    • http://lukoilmarine.com/ckfinder/userfiles/files/37049379767.pdf
    • https://daiichigroup.net/uploads/news_file/zulorevu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+the+meaning+of+preface+in+project
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e744.bin
9689f3137bb80359fbd74fca061534c327b5c8a4c5bfa7a6e6a6a658d4c9027b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE744 11004 bytes
font_01_sfnt_off000100a9.bin
a1f36412a09f92f7338d9d9d4eb138737de7e251cc57a3768890df2f9ec4424c
pdf-font-stream PDF embedded font (sfnt) at offset 0x100A9 16644 bytes
font_02_sfnt_off00012ba7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA7 16792 bytes