Malicious PDF — malware analysis report

Static analysis result for SHA-256 c115bd4eb7bf6a43…

MALICIOUS

PDF

66.0 KB Created: 2021-02-27 07:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 45692a04a17c879237b1c4f001a7cdc7 SHA-1: 7a7b60e216ca615ed6f41509d0eb55bba2d25db3 SHA-256: c115bd4eb7bf6a43fb6ad06a84e5220fe8809f45b081597179b1ce26d1493285
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://vilenefex.ru/wix?keyword=les+brown+speeches+pdf PDF link annotation
    • https://cdn.sqhk.co/miloxuso/hjNGkid/quran_english_translation_shia.pdfIn PDF document text
    • https://xeromikivato.weebly.com/uploads/1/3/2/6/132695960/pakeresofapemanex.pdfIn PDF document text
    • https://fafamamijusoma.weebly.com/uploads/1/3/4/3/134371196/9889972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476429/normal_600770135e5cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494146/normal_602497facc3f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489588/normal_6033fe983adb9.pdfIn PDF document text
    • https://cdn.sqhk.co/potonefamuve/bidK6Uv/21384761825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406782/normal_602aab48aaf0e.pdfIn PDF document text
    • https://cdn.sqhk.co/lakuxezaj/jcjdhhZ/64314221918.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496381/normal_5fcf09207f306.pdfIn PDF document text
    • https://cdn.sqhk.co/menodotitit/pXEhfge/tikofusokeredubovos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376629/normal_6022083f34384.pdfIn PDF document text
    • https://salizobujexi.weebly.com/uploads/1/3/5/3/135325558/d47e2e.pdfIn PDF document text
    • https://paguvobidelovug.weebly.com/uploads/1/3/2/8/132815355/rilumuzufiriluf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/game_battle_royale_anime_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/2016_camaro_ss_manual_gear_ratio.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/i_hope_your_doing_well_answer.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81E 5172 bytes
SHA-256: 41b97df4cfdecabc628390d387948953ec0443ae74fd4cd3a0e3d94983c17422
font_01_sfnt_off0000d9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C1 9768 bytes
SHA-256: 89ac142cadb3bd1cc4093f37a308974b8e71aee8d12872592b037881d0849c66