Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cae7c0569046c19…

MALICIOUS

PDF

44.0 KB Created: 2020-11-08 05:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 2e8cd587064d5b3740d0c2601ca68cb7 SHA-1: df379eb9bf2db7c54c529a3026cce6dd7622b494 SHA-256: 9cae7c0569046c19afd563270abba20815414e5e9b8c71ea58c635aab3824ceb
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=chick+fil+a+application+pdf+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f87173122681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f8c68eed9d2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452862/normal_5fa2a4da7863c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_5fa46a6d7ef84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f871d6fb3add.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389809/normal_5f9b1aab11487.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://pazeden.files.wordpress.com/2020/11/86767518253.pdfIn PDF document text
    • https://pavezisetapo.files.wordpress.com/2020/11/fundamentals_of_structural_analysis.pdfIn PDF document text
    • https://dowuwiridewe.files.wordpress.com/2020/11/98103904940.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/fountain_hills_art_festival.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f15d196a-31fa-49e4-8282-b4d67aba8859/quikrete_pool_filter_sand_1153.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_off00005f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F58 5000 bytes
SHA-256: 65729ab5169249dcb30f435e89d98c3a74dd867d0ba5d9eecb4351f8056706df
font_01_sfnt_off00007049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7049 10788 bytes
SHA-256: e84975957ef671ea02ad2ea1bb4a7eb25bdbc026888f789c65161041076d1ba0
font_02_sfnt_off0000952b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x952B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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