Malicious PDF — malware analysis report

Static analysis result for SHA-256 119bb4673e5da811…

MALICIOUS

PDF

37.6 KB Created: 2020-11-05 16:35:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: a647c9680fba36cab9c5b27d2e6d9058 SHA-1: 98cc8b5a2696bdc56438f8bb453458448b6bde3e SHA-256: 119bb4673e5da8115caa8e4fbccc1c199cc140486c620127c14efa1d4a5358a0
134 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.
  • 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.
  • 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/123?keyword=california+acknowledgement+form+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f8a92c79612b.pdfIn PDF document text
    • https://waxitajoxozaner.weebly.com/uploads/1/3/4/4/134474673/dda03.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/155e4ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_5f9b8f2c4d503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_5f9476eb79ac3.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/6659347.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005426.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005426.bin)
    • https://s3.amazonaws.com/fowikorejodi/plain_folk_in_advertising.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/riduko.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/77262565412.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/fitex.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/73151423666.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/67633003104.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/93876059662.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 extracted file (font_00_sfnt_off00005426.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5426 5496 bytes
SHA-256: 4f478ecb8b195b155ee1859a40c9239858d6e0489e9d5347c8f094e646b4e896
font_01_sfnt_off000066d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D9 10216 bytes
SHA-256: 95fec5c62c33bff360095b88e59c8e2787a8545be6898b27e2f3cbc51080d8f6