Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e031ea02b91832…

MALICIOUS

PDF

74.7 KB Created: 2021-08-17 06:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0e5a6e397acd172ab447e665bcd792b8 SHA-1: 6befbc274fee95ddc2af63d51699b6c8c16c9385 SHA-256: 96e031ea02b91832d8a7233e5bb603de0dea078c58d651c08fd8298c6cd1f893
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many pointing to compromised CMS upload storage and disposable hosting, indicates a link farm designed to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit vulnerabilities or deliver phishing content, aligning with common PDF-based attack vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://gernano.eu/gfx/userfiles/files/kevakoderasiwifapisaleki.pdf In PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/13236394972.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8a322677f---37117051660.pdfIn PDF document text
    • http://catgarner.com/clients/873270/File/nijatuwo.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/27457869951.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c53ff6906b---norogixiposusokip.pdfIn PDF document text
    • http://summithigh49.com/clients/3/33/3334069ac8a672cbece4a9536eb221cc/File/24606769609.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/37420934762.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/otmj746buuho56bic8rdbrl7au/82183117854.pdfIn PDF document text
    • https://invest.pl/userfiles/file/fufisumajepe.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/9973886099.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/93f57de0a774b3c20ed0ac1ed4e50f11/28742113193.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/66d89a13860ffaf8b5827bb7adaf519c/lerozevuxarowolifafiw.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/rinibalewapuz.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/kasofibefifawigod.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/07/07/file/61736631164.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/rra6bh1h2ihtr18csoa3og48eg/rovaxijude.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/faxibedederumarapukife.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/reneru.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b244f9230f---84168537690.pdfIn PDF document text
    • https://domilot.com/uploader/files/49289272892.pdfIn PDF document text
    • https://epiphanych.com/images/file/difexaketak.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e85e7d787---kotegukezufi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=cuaderno+de+trabajo+6+grado+respuestas+2020+espa%C3%B1olPDF 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_off0000bbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF5 17184 bytes
SHA-256: 53a65afd619d0936d84b28d0e57dd2d413441a5a40f72b3cdc95ed42d85f918a
font_01_sfnt_off0000e7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC9 11492 bytes
SHA-256: a3aae4742f58ca54cc6705581716e7efbc86a28076f69876bb00a7e9eeda6fef

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