Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de4ddb4b48368e3…

MALICIOUS

PDF

144.8 KB Created: 2021-06-19 12:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 65b72973c6a660ee95a297cc671a03d6 SHA-1: c105b310fc053c119fb40f45b24a2816ef5447ea SHA-256: 6de4ddb4b48368e36ba21aa35fdbe6d0a2e3e9d7c2da27be40796acb25d684fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c7f74ceca---23593693051.pdf In PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/etogn1hq6tgpm47u9ms79ogbg2/petitikuzozikazupofope.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/4jcpevl6re6el8uqe47mg7q45u/gesenisupapabijewumis.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d528e9a4f---69690553480.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/e35f1f047bff6eb2a3e31ea6d0565a10/39936811789.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84953821457.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/27814630681.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d972a43ee---gujezi.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/1953d8d36203fe892e8ebef7a3ff8804/jumufizepadimo.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/milabifobal.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/ona9vkl160rtv5gkf35lh1hb40/rebokanofuwubuwujekejan.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/72029915167.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5cf39cea93ca956e326800e0889b51c8/92248528064.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/858758d8b86abcb15a589e83d8d00fae/81634833900.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/gvf5que58ou6rccc5dblhn804n/49129686817.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=dragonbound+aimbot+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ea0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA0E 3272 bytes
SHA-256: ecccda02c8b12f398c6b4392a70fdec6dd513c33741ce9c78560f94a796346d8
font_01_sfnt_off0001f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F5E4 5156 bytes
SHA-256: 7c6ba1a073f9c5cbb80c58e15057f7576eab82197cda70a845e3cccfce87519b
font_02_sfnt_off0002075f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2075F 14012 bytes
SHA-256: b8fc28b085b82cbb01a354fdc4513b697a95515d95d676dddfca80e071721442