Malicious PDF — malware analysis report

Static analysis result for SHA-256 17048b07a6edf864…

MALICIOUS

PDF

90.5 KB Created: 2021-06-29 10:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d21ad1963b97838426c378fb7436e80f SHA-1: 90aa59b0738ef9a6c9c4437aba64406fd2e8b782 SHA-256: 17048b07a6edf8643e92d487cdd90d2b6a14402e386a8c116413ec7daf4ef009
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 or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to deliver second-stage payloads or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://krisoc.ru/uplcv?utm_term=principles+and+practice+of+infectious+diseases+9th+edition PDF link annotation
    • http://sitoad.com/bbqjoekey/files/202106091401363619.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/xuvavosulaloma.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/tegufagidowugo.pdfIn PDF document text
    • https://actorconseil.com/files/file/kixamawomovajek.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/jozuxon.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/6e27f8baffe9d59494e93ee5f8011f44/munabobefo.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/weximirazebaduri.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/visudag.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b036570495---fijuzikabe.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b01f5342051---kejalopadizalufevi.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/julomomin.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/92083c7ff48985c3175cf6007b312e7d/zadusakofedidixatotabo.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090714ddd177---92200589416.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/feliwabewu.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f343217a01---14791705490.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/beaf3a71c2862cab2cac228507e63e33/noluxojumavonu.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/26726651079.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/nonolifosobizepis.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092f90132cc9---10549501326.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/19509654576.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/pokotekixojigov.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/35439997123.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/t236lllh6fknnfebh434lekik0/92951162072.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/f243bff78efeb6f0881a283a673eb695/zuzugerepukawetilujav.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/438165b112396502f81640d12be77470/99942638164.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_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 18464 bytes
SHA-256: 92fbf3856ad969291e08dde1b01c48514939ccb2240a43fb2636ced2a4f3f489
font_01_sfnt_off0001289e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289E 10984 bytes
SHA-256: 81a15ee77ad1f71cbed88aef82bb9bbd078ccf844d341d11dcfea35f58296997
font_02_sfnt_off0001420d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1420D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.