Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0825aa0adebc14…

MALICIOUS

PDF

70.3 KB Created: 2020-11-02 21:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: b4e5980d369bf2837f5c4d1fe6339755 SHA-1: 08674badae40dfa9cda74ba4aafded2569d49b6d SHA-256: fc0825aa0adebc1459f84edc8f321cb98bf8fed28cd20bd35ad2762329c0ff6d
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://ttraff.link/123?keyword=warrior+cats+darkest+night+pdf In PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/9274580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_5f997fe3bacb2.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/nuxug.pdfIn PDF document text
    • https://mujugoseboli.weebly.com/uploads/1/3/4/3/134312554/wodizatalekur.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/e6d69b9.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/dobod-rifibadaveve.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://uploads.strikinglycdn.com/files/1036d519-f533-4e59-871b-235b4e0244bb/kazikebafuweduzele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c12741c4-dd4d-4f64-b3ab-7f468de56587/mustang_racing_seat_covers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db71f461-e911-43d1-8487-886854c93bf4/tsuki_adventure_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4155/9966/files/boy_scout_crime_prevention_merit_badge_pamphlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d424132-786c-4f3b-8010-6782804344d3/51840903032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9453/7898/files/present_perfect_spanish_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cada6cf-fc0d-428d-a975-fc31654ef9f1/67991131465.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/stages_of_buying_process.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_off0000bb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB33 5252 bytes
SHA-256: 40063e0141d020731fc4e263f6bd4ad4d965e8a04ea41e46898762403d874927
font_01_sfnt_off0000cd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD16 15640 bytes
SHA-256: fbb31add993c0a15306eb946b50dba9b43e5cf488b5fffbd9c0158cf70a96248
font_02_sfnt_off0000fc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC08 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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