Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6e109332e3c8a2…

MALICIOUS

PDF

79.8 KB Created: 2021-09-10 22:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f945af2c1545cd694753f390f8bd4ec0 SHA-1: 06010fa1c4bda47d985f1ef68f966f1d6ff44abf SHA-256: 9c6e109332e3c8a27db6f34690755887479ed9e751d5a7cb12ca0062fc0b38a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs and compromised CMS uploads points to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://chcial.ru/uplcv?utm_term=boxing+fight+tonight+live+stream+free PDF link annotation
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/a79d82cb6b0ceb0f60b08514b0973323/miluwazusopusafixemixotin.pdfIn PDF document text
    • https://bachson.net/upload/file/32082952186.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/tamazuxolunevibebimenoz.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/riwor.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/bizugegaganozinenisele.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/67096011950.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/50722544604.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36358600605.pdfIn PDF document text
    • http://cke.hk/userfiles/1296594754.pdfIn PDF document text
    • http://qdjshg.com/files/file/setig.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/245b4a858c670e77afd0d6d4c5ec0cbd/divopilu.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/rulesi.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/magowufafavoviralobi.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/xelasemuvixirobut.pdfIn PDF document text
    • https://kham.vn/userfiles/file/febajexanora.pdfIn PDF document text
    • https://almavilag.hu/files/files/27038074044.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/nopobunujaxolonebudevet.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/790c52f935af571659d13ddb84d7068d/6806959772.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/tadevugazukadupu.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342ce0501cc---83326068991.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/gskuc5af03kjeamqnjmauf8go8/26814650659.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/tojoxokubagitofokigivofin.pdfIn PDF document text
    • 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_off0000cfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE2 10884 bytes
SHA-256: d570fa771e1d0d8e941b8e1794096275e31bcf77bf97df48219b831ff830dee2
font_01_sfnt_off0000e8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EF 18564 bytes
SHA-256: 5e8f0ad5a3203f31adfbcac58435e1707fc32b79e036b25cdf1d423ae8cdf8dd
font_02_sfnt_off00011969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11969 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1