Malicious PDF — malware analysis report

Static analysis result for SHA-256 5206c8e8d2d6f028…

MALICIOUS

PDF

89.1 KB Created: 2021-07-18 08:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bbebb6cffe19d84f830af54189eb0d0d SHA-1: 9f7e2d30f0a39846c645efcf051e82da2494275c SHA-256: 5206c8e8d2d6f028034068634ee01eb64ced7f56405114fa321f1b53bf27e2f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs are designed to lure users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/d91e77cdf1d0ffb502a481a4e17b4159/julasefilurojig.pdf In PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/41380408212a7e322506c21755df537e/xuren.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160babbf65b5ef---jevavutavumumikosus.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/38541684943.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c64145affb4c241979e06325a5d3d230/49147150583.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/22673807974.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/74gkldggqlmf75h51uc8dcu7ld/xudebogifitu.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/wizadixakivuxobuvimijumug.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084aafc65548---wetet.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/2quqqp55n50n35ok3pdb62ltji/fumafulenebukajokupu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a259bbabc67---40865925257.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3283ada6f9---puzemunalawasi.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7b3fefbf33923ee549a9b6d768fc38da/fivowilirop.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/83241173451.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a88d72ea1fe---rizitejiminodelodidezebe.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9ed2be796---palilelivexu.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dead810c77a---fiwal.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cccd6d3de7---73803350262.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/8b9e6d961cc9797b065e58d1919e4e6b/68101143874.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/c0fada8072436d52a3cbb0357284ee34/34580046302.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/xosuduwafapakuxopudok.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/0e6b100ed3700f64d9dc872661b1dd58/wopaxalevaluregapubow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=mad+max+game+free+download+for+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_off0000f8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D3 10784 bytes
SHA-256: c273667c908546f9fd2ba9ca66db97f777796c64ce47eedac283ff7bede92643
font_01_sfnt_off0001117b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001298d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298D 17560 bytes
SHA-256: be86b8dbe17a3920d4c04d97d9606fa3846c4ea3d3aa1ac90e1f5f4f219ed37d