Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c8b5678873f908…

MALICIOUS

PDF

75.0 KB Created: 2021-02-15 19:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cf2679376b146030278f7131d7ab42a7 SHA-1: d5b4b00e9427f8f243d7bd7aa7f78196acde42fa SHA-256: a1c8b5678873f908639a12b0da7a604b214d5f822dc0fa74f41a3d9c78d48366
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://seumenha.ru/wb?keyword=the%20magicians%20book%201 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420612/normal_6013dd0c3c31b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479435/normal_5fdb714a90377.pdfIn PDF document text
    • http://kengoru.space/candy_camera_apk_uptodownz8uat.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/jfsdjbe/john_gba_lite_emulator_pokemon_fire_red_cheats.pdfIn PDF document text
    • http://ig-mediateam.net/laravel_reset_password_email_template_locationcxfc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495050/normal_5ffb9f3a6fa1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393514/normal_5ff7e331a40cb.pdfIn PDF document text
    • http://richmaya.site/mizofoxuzigixukobaziaxlg.pdfIn PDF document text
    • http://workshop-fb.ru/2e_chronomanceruzu21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377674/normal_5ff2a0a2e9e84.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/tesapibebujep/fesexubiredakolit.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/pelepo.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/vanulafuwexo.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/kozufevipofunel.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/burgers_zoo_plattegrond.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_off0000e9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C1 5288 bytes
SHA-256: 65e6c9fbc37d7e9ef027bcb65b634006ebaab71f52df591a3371498c64a7e9d7
font_01_sfnt_off0000fba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 10480 bytes
SHA-256: 7fef96c4c3b770796edeebec6a9c8846db4c34416fae603d22b0ebcff3e1e407

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