Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5e8c868b7f1ce3…

MALICIOUS

PDF

46.3 KB Created: 2020-10-10 02:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f470156e2012936dfa72c0756f17af5d SHA-1: b89d5349a001d8e56061afe4f11f5ac1aad8ac81 SHA-256: bd5e8c868b7f1ce398b8749bfdab7d15d7234e0e6a340359843531b5054213da
132 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/strik?keyword=madina+arabic+book In PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/12330161495.pdfIn PDF document text
    • https://site-1048184.mozfiles.com/files/1048184/wisume.pdfIn PDF document text
    • https://site-1044076.mozfiles.com/files/1044076/91887036103.pdfIn PDF document text
    • https://site-1037261.mozfiles.com/files/1037261/35415497143.pdfIn PDF document text
    • http://nukapodu.iraqueer.org/uploads/1/3/1/3/131379227/1307481.pdfIn PDF document text
    • http://jemux.jamespaveysport.com/uploads/1/3/1/0/131069921/5ac003d1c84de.pdfIn PDF document text
    • http://mukol.bereangracechurch.com/uploads/1/3/1/8/131856333/bavegalobuvevig.pdfIn PDF document text
    • http://pupivuxuv.nwascoop.org/uploads/1/3/1/4/131408864/satojisit_torekevuna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/082fa579-b30e-425d-ac88-8b55d56b88a7/luvuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1dd1cd5-933c-44b6-b7e1-64a80f286f40/zunemorifunimisije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d2e58d-bc32-429e-9872-819d86c57995/puzajixawikaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ae4bfb-2056-49ce-9599-5ea684d116f8/31261136239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a48161f-8693-46c6-99ae-f93dd5ca910f/46889274992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a4c8d5f-f040-44a4-a365-c1587f2d3256/vuladakusugidefaw.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000084df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x84DF 22316 bytes
SHA-256: 003577ae9ca5e7aa2d918b0236dec656ab010b0135fc20213a880852a43f9466
font_00_sfnt_off000052a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52A8 4932 bytes
SHA-256: 042e48a5b2cb78e835fc717ec86346f0c40c3d6e4850c59b6516aaf6f753a5ae
font_01_sfnt_off0000638a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638A 9664 bytes
SHA-256: 59a0887106fd06a9862fd45971a9920d3a070094754452bf14eea74df3a88dfc

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