Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ddce5243873442…

MALICIOUS

PDF

86.9 KB Created: 2021-09-06 12:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 29600e8a27fd962ad0da125bae47e00c SHA-1: 4c5e4916687296da81d03d4a3a19d58ed9c9f7f4 SHA-256: 06ddce5243873442743fb49b74c9ccddee823873dee2a5d4634235e40a7b20d7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://thegioibaobicarton.com/Images_upload/files/71402233344.pdf In PDF document text
    • http://ikuma-car.com/js/upload/files/roriduwitalanig.pdfIn PDF document text
    • http://teerosy.com/ipp/images/uploads/files/zajewenuzovotaxumarete.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/d3702484df5b26f4cae327b0c4c86a8a/moronakinikepoxaxole.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00c9e5978---jemake.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2f2d8988c9---nopasinurilerurolowov.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6f6b64ee---34428969190.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/xavikipenox.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/zolunewip.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/494a8323279adf92cfdfffd745235a8f/woreroxorivet.pdfIn PDF document text
    • http://abwva.com/uploads/files/zijededemubokimovex.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/95858778133.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/84595449823.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/i7vmkpr643rrfbgtokcvo4gdv5/fobefoliwutegelozopixat.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/67738609665.pdfIn PDF document text
    • http://rld-carbon.ru/file/96133430607.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/romijufunelino.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebafcc6a6e---71098894203.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/dubuvamavogotafawutapi.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787f86a3623---69511735118.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/8528597630.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/4821ba050afcfe82bab10dadcfefb4ae/vatatiguxifu.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/48043662780.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/letunasoremakatalu.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/2179382025.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=il+piacere+pdf+liber+liberPDF 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_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 17728 bytes
SHA-256: 1fd7fa94f42579256760dcaa069074e9a9030bf0227d4de87faac014ae79c34e
font_01_sfnt_off00011f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F76 10212 bytes
SHA-256: d44854c0146a56faeb27b35683daf02695ea925ba6ac71fb78dcc76cd109e6cc
font_02_sfnt_off00013631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13631 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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