Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bda6d4993b07514…

MALICIOUS

PDF

41.5 KB Created: 2020-11-07 20:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 4caef29da923fc80235c32c1909c7868 SHA-1: a6e1dff255dfc789a663edbb367011c9c22bb26d SHA-256: 6bda6d4993b0751429322ad876081ce7d42802309d67a792099a5fbb6aad3705
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://traffking.ru/aws?keyword=great+plain+school+website In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_5f9842393bb0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460688/normal_5fa5ac3983f36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5f91f48738929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_5f98a197046f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423715/normal_5fa3d20e8c604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403824/normal_5fa2e3f3e2ed0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f9316688f2b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_5f9261aaed309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f8a9acd822df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f9f3518a88ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_5fa60cb006d5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373504/normal_5f8a1317448fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f9f014b0b47e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d333f9-c132-46d2-a5ab-e59aa56c09c0/69846053249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f89abd74-481b-493f-b350-6c1e23e2ce12/kasonimugen.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_off00006220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6220 5284 bytes
SHA-256: 1bc962a3674ce4167f6ad236f6c8308e2274574f1184148965c23e2c2eee083a
font_01_sfnt_off00007423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7423 11368 bytes
SHA-256: 9bf64b6560976e8a3c078ffb2a3a9addbaf07550bb977215b13c61874311bb4c