Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea99c28aaead14a9…

MALICIOUS

PDF

67.1 KB Created: 2020-10-15 01:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4703569bc36f87a61be87828d286c36d SHA-1: d35067e7653fddf68e828c3ca8aa74c10a8e8d4f SHA-256: ea99c28aaead14a90aee3ae102408d4a289a4e822c03afb4423bd0f7f5f99bc0
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://gettraff.ru/123?keyword=psychodynamic+diagnostic+manual+2nd+edition+pdf In PDF document text
    • https://site-1041950.mozfiles.com/files/1041950/back_button_apk_android_2_3.pdfIn PDF document text
    • https://site-1039631.mozfiles.com/files/1039631/91933117465.pdfIn PDF document text
    • https://site-1036910.mozfiles.com/files/1036910/dobuzafezesobiraxa.pdfIn PDF document text
    • https://site-1037074.mozfiles.com/files/1037074/10734751149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f876bc771199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f8707a09ea3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f87401e49534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f874627654e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f877888c99e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f86fe6842b5e.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/f52216fb-535b-4826-b651-e07caccc463f/pupodonex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ecba222-6d98-4432-aad1-26059a3c38d0/22791802417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a7bafb8-f953-4b6f-a4b7-e74a84d89bb2/7041866875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae0af157-40cc-4373-ba0b-e1ab4a3f8595/19286643505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7613/4082/files/download_aplikasi_creehack_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/58456242791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7153/2956/files/context_clues_worksheets_multiple_choice_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5460/0870/files/dejex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7376/3496/files/zenivukepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1825/5516/files/building_and_testing_with_gradle_free.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_off0000c6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DB 5708 bytes
SHA-256: f3098c7cf02907a4f09316a6166549b4ee74ab533ff0e301158783bbe7492b6d
font_01_sfnt_off0000da26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA26 10732 bytes
SHA-256: f9d3c62c7436e6ead72d08ac41c526729f211f3787c1c1833ebd06201bb2d5fa