Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dda9f164861bd70…

MALICIOUS

PDF

77.6 KB Created: 2021-09-06 15:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 50b59fe45008054246479a41e51cef30 SHA-1: 3ae43984fc389b9bd1ccac21cd38d9544167efed SHA-256: 0dda9f164861bd70983d0fd59e76c7f42806ba9c965f3100fb13561d99cea72b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous URLs pointing to compromised websites, suggesting it is used as a lure to redirect users to malicious content. The presence of PDF link farm heuristics further supports its role in distributing malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://huntic.ru/uplcv?utm_term=python+3d+graphics+pdf PDF link annotation
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132e60a22f1d---mezupunuda.pdfIn PDF document text
    • http://maxkbm.com/clients/2/28/28fcaa936e2ecbeb6c9a97ea0f1ab253/File/tozerixunoxogelodedijim.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/logemonido.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/ea382cde4638a23f1495d8f313ee8921/62555042849.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/11627722716.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca4af4b668---diwokawazeduku.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210706_1F1E69C1D9109ADE.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/4f955373ec14dd99d9e1508c24321989/xoliki.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/panibaga.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16075d493a1272---ziguva.pdfIn PDF document text
    • https://advik.net/userfiles/file/62519723935.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/bafaf.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7a9aa7de9c63ccdf6d103e7055655b4c/winovazaxaxiragif.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/6dd650acfd3683bd939f816b8814908b/9328682900.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/97027362429.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/79439396365.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087fd78653d6---wutop.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/f23f2e50298dd2f6127755a0aee598cc/ziponedalazuduzunateje.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/kufona.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/54290702226.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ed486ed2---darifanan.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/95748757431.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/17647981685.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_off0000c610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC610 11008 bytes
SHA-256: 33d920cde69d6a2836c5d33031277a2f1ff3769c97c4f8f36ecc49ae89bca0d2
font_01_sfnt_off0000df72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF784 19328 bytes
SHA-256: ae6b1b9e90d0cb31067bf9f84aff77fec6ff148b9a25b018c3299245b710ceee

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