Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4596a24f8a70135…

MALICIOUS

PDF

53.0 KB Created: 2020-11-06 22:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 5796cd24d1bdbcff86b6111bc84282f6 SHA-1: 51e693e3490fe5cd5a975299a4b3a92aba0cd112 SHA-256: c4596a24f8a7013585b11ccedcf87dadb563a2b41b8ec6f7ec2ebec68233db2b
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/aws?keyword=tresendar+manor+rebuilt+map PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415321/normal_5f9a494e450c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f88bf2eec9ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_5f8e8563a5376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f8736d0ee64a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1c523aa0-928a-4d4c-9bac-c0398a05fbdf/kumos.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/social_conflict_theory_sociology.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/11512676303.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/kafovo.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/lowefekadezetowukavipafu.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/cateterismo_limpio_intermitente.pdfIn PDF document text
    • https://wukifopagoso.files.wordpress.com/2020/11/filme_el_metodo_dublado.pdfIn PDF document text
    • https://zereruz.files.wordpress.com/2020/11/dabodesunomo.pdfIn PDF document text
    • https://papinidatit.files.wordpress.com/2020/11/57084615641.pdfIn PDF document text
    • https://xijadijuf.files.wordpress.com/2020/11/dvd_mitsui_mdvd209u_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8356 5076 bytes
SHA-256: af5f8cdcd9d8a14425492679268041c6c3727dff24cc14d9bf7355ac3c6cf312
font_01_sfnt_off0000946f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x946F 10648 bytes
SHA-256: 6587d49756b45f95ce82d8935c814d04dbe7c063e5b42b07b6122d528de8c73b
font_02_sfnt_off0000b8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BD 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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