Malicious PDF — malware analysis report

Static analysis result for SHA-256 f019ebe3f9861e4f…

MALICIOUS

PDF

33.8 KB Created: 2020-11-02 22:12:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 07cdea25717d2e9a563f481961f0caca SHA-1: 3a9104eac3c7a7556b91360b27e68e5c6f8d8d17 SHA-256: f019ebe3f9861e4fe51879498666517fab116bd482afa8cc2b974030455ff007
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://bufobefogefeka.weebly.com/uploads/1/3/4/4/134445289/kitux.pdf.
  • 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/aws?keyword=chapter+4+to+kill+a+mockingbird+quiz In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_5f990e6164444.pdfIn PDF document text
    • https://bufobefogefeka.weebly.com/uploads/1/3/4/4/134445289/kitux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1108/5732/files/michel_foucault_nietzsche_genealogy_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb47adc-0e98-4fcd-b665-0e427e16f21c/bobelululerifibojibofuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8706b191-acd5-4d86-9b45-89e0fad6f0f2/94876433346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15bdcce4-9fa1-40ac-954f-4b5b59a5198f/6318716311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be43fb1-a5ed-4bc9-bb99-98b3e34048d7/73934315497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3301/6495/files/netflix_apk_mod_premium_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/48084146116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6443/4589/files/nat_geo_magazine_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3831/7464/files/nurotiposokukokumagiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2682/7432/files/b_cubed_cheats_level_15.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_off000046c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46C1 5680 bytes
SHA-256: 1dc81a03885fb5a01db6ea2f53c89b9321a9f3b502b19cb44b7ebc44b5afa230
font_01_sfnt_off000059e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E0 9540 bytes
SHA-256: 01618f9380f5028bf1cb0b913f9d1afa287f1133609ead4a8d10a434c71f6464

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