Malicious PDF — malware analysis report

Static analysis result for SHA-256 680ce9a9352d6746…

MALICIOUS

PDF

53.2 KB Created: 2020-11-06 17:51:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: d7782e258754202cbb3bba22b917effa SHA-1: 1adcb15578a73e302e6ff74c8e1fd9503ea0f5fe SHA-256: 680ce9a9352d67461de1da64a373abd86ade11a225eaeeb28e00b5094a078200
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/123?keyword=cornelia+li+britannia+sankaku PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f87fcebb62fe.pdfIn PDF document text
    • https://nigiseza.weebly.com/uploads/1/3/4/4/134462574/d953609c8.pdfIn PDF document text
    • https://kisupumusu.weebly.com/uploads/1/3/4/5/134513531/1426692.pdfIn PDF document text
    • https://lixevipilevorox.weebly.com/uploads/1/3/4/6/134634278/4619984.pdfIn PDF document text
    • https://tumupexaru.weebly.com/uploads/1/3/4/3/134333537/2770860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379482/normal_5f8ef6d09803a.pdfIn PDF document text
    • https://karozazosepi.weebly.com/uploads/1/3/4/3/134316788/8026.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://mogefemo.files.wordpress.com/2020/11/wozedekovipubogu.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/merozasopegujibe.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_off00009103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9103 4788 bytes
SHA-256: 61e0c1a14f85f9f447ac5af7a67d418c5970a76868af7c8183e6aaefc28300b7
font_01_sfnt_off0000a150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA150 11152 bytes
SHA-256: 480b6a5dd29252eb22640ea649c40ede1c10f8da78b3f37b049e7a7541b33487

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