Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0619db98344416…

MALICIOUS

PDF

91.5 KB Created: 2021-09-05 05:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 733022c12fd9c74a8c956b37e76c0e8f SHA-1: 8708a7d3803d779fed5f36672b8fb737fa38e667 SHA-256: 1e0619db9834441649aebf54a31c18c6c54e37497873ff4501abb4de1150c28c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613036caa22ac---7184900138.pdf In PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161239bed18628---39572237722.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/29c6dbc7a28c195e658a69f4d7a1d962/degobigavegorafom.pdfIn PDF document text
    • https://knjizara-harfa.rs/files/mumiwevos.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/74972324529.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/bujowesadasebojagufomiweg.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/93691454434.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085b8e4297c6---rupanorugarumipebow.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/33589719835.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/tizam.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/7v6nk8b3mb4u2b2na5rhrif8av/8257542668.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/pkcfpuvvprd6ap5tvsotq62qh5/73996335515.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/39209278998.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/73282dbdc3950f088fdb02d02a01147b/84830943979.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/fabinugagikefujigi.pdfIn PDF document text
    • http://alexandrapanayotou.com/web/images/static/file/56248870392.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/61460283221.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/42961086766.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611d6d1c0f026---73843542262.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/sulikulejosalidowobusisar.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/74321826500.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/4vogtf128fm3t0kb6mgil7umov5bc27c/69713337453.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ede746ccb---vugafojabam.pdfIn PDF document text
    • http://www.victoriousintl.com/new/resource/files/xinopavokov.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/7c05505b4feb9b40e8c86605450b3c2f/fafowe.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/038cp4k9aa06v4mo1itpph15d5/13010763935.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=destination+b2+grammar+and+vocabulary+pdf+freePDF 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_off0000fa23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 19224 bytes
SHA-256: fe0075b2392dfa3930ed35294eb19ba45ccf6346cb7f09755ed3fa6084ce19db
font_01_sfnt_off00012cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEE 11504 bytes
SHA-256: 9b37cd6cfcc1cc1bdccb9b04f1c29f82e40119602279914c933a28429dd12d5d
font_02_sfnt_off000147e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1