Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d2b4743432efad…

MALICIOUS

PDF

80.8 KB Created: 2021-08-15 06:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 809feba71e3c3ad0cae1e1343d789e53 SHA-1: 427f4c89e9a0ee1cbdd88590a1d37f1c4241e61d SHA-256: 62d2b4743432efadeb46b81753f62c87077710bba0b2cf9730769f3791f5283b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/a75f73b0d970fe0bc776a551f6b0d42f/62635693723.pdf In PDF document text
    • http://spamsmsgiare.com/media/ftp/file/43389431799.pdfIn PDF document text
    • https://opescom-store.com/uploads/FCK_files/file/72928308443.pdfIn PDF document text
    • https://wecareprogram.org/images/file/58051985489.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/7c792d49100a3af76fd580ff7064644a/88082927786.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16083838eedd77---62526095712.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/97006395478.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/48537485235.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210528_03E91A7C343BC993.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/punalabefejalifudojapiwep.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/76497713688.pdfIn PDF document text
    • http://ombs.ru/uploads/files/22449098530.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/21717021842.pdfIn PDF document text
    • https://somogyplusz.hu/files/sukuwe.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/27587619216.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/zemed.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/s5m63d3vh7eka6l8vgsa832nd1/manirokuniditugolofano.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/0b6591396a62bd478786103b2165827e/85132455931.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/vazumapaludevupejuriz.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084054abd469---1842052013.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/pidawosi.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/gf9cc5mp1087at92pcp2538dck/5516713229.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/39880822760.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/p5rna6jip5nao6gj0t6cd2kdmi/24075794539.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081accbad445---nekojizijokexexosisuvi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=whats+social+isolationPDF 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_off0000dbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAC 16756 bytes
SHA-256: af599695f37364cedbb1f7294e9784ac4bddb92818a2b9d40b9c561a30cc5c38
font_01_sfnt_off00010756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10756 10088 bytes
SHA-256: e5102eff2302bfe9848f86a2007bae9d913df05a14409c52e384d01e7e62746a
font_02_sfnt_off00011dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1