Malicious PDF — malware analysis report

Static analysis result for SHA-256 430904d39d908469…

MALICIOUS

PDF

85.2 KB Created: 2021-09-05 07:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e6022ab5ae5892a9be0951ca28f5f87f SHA-1: e70f5a4575b4d0b68650de7f48b646ece5ad96db SHA-256: 430904d39d90846932e85ddd0b17c8c2071c1cd7522c981c447cb9c767fe344c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a115b7a76---ridib.pdf In PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/059172dbb84e134788286a876690c693/gilopoki.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/b4g7nl7v5ua21rcqts8ebp4il0/80738074429.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/repudejilo.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/nunosapepetevinoxe.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/46673681572.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/91281647749.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/begamobajujadurepa.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c65c221af57a46fece6762e1d92dbb75/94047818944.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b004605c0e1---49789832873.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/kq22a4fo10g1pts9tjags0i6qj/gifezusikuxufiduwagapi.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/03fb474e0e80536d6557af702e29ef99/mexigogegat.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/967f5fa8cf26a7d70635fc3b8a76c3eb/24864599060.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d787d6aae---lobaxalifof.pdfIn PDF document text
    • http://cobmedia.hu/include/kidozok.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/89a7f772ab1f498a62854b4fc76fc3c0/18653107099.pdfIn PDF document text
    • https://yz-yongzhong.com/upfiles/editor/files/48064114520.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/60886761360.pdfIn PDF document text
    • http://geose.ru/userfiles/file/95790496953.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/4cb364f3e880840f05dbee34719c9a2e/18301915872.pdfIn PDF document text
    • https://network-italia.it/file/1334028158.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/34f086ad5ao07mnlvl82cr9247/keduzadetiwewim.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/53371203977.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e51fc72b1c---45104025550.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/rirelimemagalitijijeni.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160944e5d69d11---33939761411.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=comment+installer+le+mod+lspdfr+gta+5+pcPDF 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_off0000e358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE358 11128 bytes
SHA-256: 8c07040178214f099fed10f50a78344e6d53f24aece770acd7e84153e08c8904
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 19076 bytes
SHA-256: 4a1299514d5c2de21a244ca674ae7cdc3cb6a4f6aadae31b7a9089c15745a650
font_02_sfnt_off00012e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1