Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6445224bec41bd…

MALICIOUS

PDF

40.9 KB Created: 2020-11-07 03:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 0f4ab0c89c166fe780d8bf829d509d5c SHA-1: 26845ce72ef26f463b765918219dfffcf80bfa32 SHA-256: ba6445224bec41bd3b7f19db86c56db025fe4bccff3aba9803020a6052135fdd
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=ralph+c+mahar+middle+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388272/normal_5f8e9cda6df05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_5f96cf8e4b3fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5fa00864aa7c4.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/vitelitubovuluj/fewafozidar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13f36ef-46e5-42e1-b74e-9272b56c5514/tabela_de_torneio_de_futebol_com_5_times.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde1ac3e-94d8-4eb7-a439-960be2bd1391/mewipimo.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/8625666511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf9078c-a36a-4a28-90c3-8bdfb7102e78/4482058584.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_off00005ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE9 5320 bytes
SHA-256: ea00d6b2828eba5a6c3e4b835e86d01129f5df5a78d50661bfea0bd272d436f9
font_01_sfnt_off00006ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED3 11992 bytes
SHA-256: 8ae4a56cbc0d21c28ddc9c0a94ea93b38b927cfb2b675a88a164bcacf120a4cb

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