Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19a3f0cab3577b8…

MALICIOUS

PDF

41.1 KB Created: 2020-10-26 00:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 80c160cf6c4b88c1737470e95154a2a3 SHA-1: f31c4daef7fdaf79dadce852fb9f1ee25cbe392c SHA-256: b19a3f0cab3577b80a45064707a5749fc8466da1428921613acce314a7ed809e
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/aws?keyword=bach+bwv+552+pdf In PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/jelositobepip.pdfIn PDF document text
    • https://morekifozolil.weebly.com/uploads/1/3/4/3/134332894/fafumevuzew-febufoferux-fenexudiruna.pdfIn PDF document text
    • https://vururera.weebly.com/uploads/1/3/4/4/134493513/rimabasopigalibakevo.pdfIn PDF document text
    • https://reredutubonuki.weebly.com/uploads/1/3/0/7/130775370/fenis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407747/normal_5f9375fa15099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f87654ed7900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383921/normal_5f8e849b0de06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f9204a3a1c3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5f888b76714db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5f910fc847342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5f90507ee6dcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/ludo_king_game_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3826/8318/files/android_studio_relativelayout_overlap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9664/4016/files/android_sdk_tools_for_unity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/weathertech_2020_le_mans_spotter_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc55c2d-4e63-49c5-bdd6-0ccbf836dbe7/49096559944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfdb10d2-6a6a-4bc1-8e2a-f21742c66695/yellow_submarine_font.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/701729fb-bd88-465d-ae03-8a7fe7bbd8bd/jejekex.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/15434396674.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/word_meaning_hindi_to_english_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/gaxujopo.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_off00006147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 5532 bytes
SHA-256: 1c207b5706c1342e0a1c5d4fe4c29049c4df4711a211ac3cc47754c4068932d0
font_01_sfnt_off00007435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7435 11048 bytes
SHA-256: 10f174330134af8d71d4866bfc2d8c954fc5761887111f10fbd9b7a9ca408670

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