Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53fc70deba19e5b…

MALICIOUS

PDF

51.4 KB Created: 2020-10-15 09:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3de49a71034f3091b733bcf7d2f30d7c SHA-1: a62ff8044b3de135939d8dae7b1ba8d715e9ba2b SHA-256: e53fc70deba19e5b2a32cdb177c84ac5150e5f01538a4787e2ece9ee41278b3b
124 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=esl+interview+questions+and+answers+pdf In PDF document text
    • https://site-1044016.mozfiles.com/files/1044016/96003883049.pdfIn PDF document text
    • https://site-1043134.mozfiles.com/files/1043134/83344938989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f870c9be9686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f8753da0e986.pdfIn PDF document text
    • https://site-1040512.mozfiles.com/files/1040512/91485147208.pdfIn PDF document text
    • https://site-1043123.mozfiles.com/files/1043123/79096799759.pdfIn PDF document text
    • https://site-1038575.mozfiles.com/files/1038575/33318316113.pdfIn PDF document text
    • https://site-1045398.mozfiles.com/files/1045398/tijona.pdfIn PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/torokakogudeda.pdfIn PDF document text
    • https://site-1037218.mozfiles.com/files/1037218/vogefelakibesutili.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/46860a91-fb32-43a4-b640-c8336bf40a13/37459404785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/763609ea-87cd-403b-809d-547321527db2/5408074833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92562619-13ce-44a3-97c1-1ad2935d58be/vivaxepigobom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e21e3b-0069-4e85-a04f-b32c88d4a618/tokenolokifadupevadazedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf909f1-696e-40d0-8ce2-201900306fcd/6089213180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b9919e-0d1e-47c1-8b95-c80b7be6de4a/20608429529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ed2b70-8dec-4049-a13f-5a3255953122/91353521280.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_off00008a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2D 5272 bytes
SHA-256: 5968b10b7bdb37ba4a1d0ec3b23252499ad614c8cbb0c24007bd0d096b51d6bf
font_01_sfnt_off00009c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C38 10808 bytes
SHA-256: 5a50b494d2178dae075f4179384e7239d25fab1e57fe38a1ed0a062ac254864d

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