Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab77cee25e1a719…

MALICIOUS

PDF

44.6 KB Created: 2020-10-03 09:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7e95412b810dd0a5565f24d249519b3a SHA-1: e4365c689a51ddfd02a71fdce16defbf366f77b6 SHA-256: fab77cee25e1a7195a931b4f1e8ff5073f4d77a4199b04014d7b8f647b6e39b1
184 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?keyword=toyota+corolla+2020+carsguide In PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/68911883821.pdfIn PDF document text
    • https://site-1038820.mozfiles.com/files/1038820/11508048576.pdfIn PDF document text
    • https://site-1037073.mozfiles.com/files/1037073/tizikoxefinibabakanorese.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/26213647094.pdfIn PDF document text
    • http://nugavadab.carolconnor.net/uploads/1/3/2/6/132696056/kodekapimofi-katekogiriru-nobexezeges-vutosetevum.pdfIn PDF document text
    • http://fezen.h2oaquapremium.com/uploads/1/3/0/7/130776279/c8e4181.pdfIn PDF document text
    • http://mizoli.aclhandweaver.com/uploads/1/3/0/7/130739718/durokorofomub.pdfIn PDF document text
    • http://kujezute.technixsolutions.net/uploads/1/3/0/8/130814788/48a6b36392274.pdfIn PDF document text
    • http://files.claudiahaas.com/uploads/1/3/2/7/132712268/xonesusenetorok-busodok-fivowedamoko-gubanixumufef.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/89ba0d63-d283-48ed-bdf3-d50d9cb510bb/likusamezap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b081b53-a896-4b69-9b05-ec56dd053e45/lasewigebur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11033f95-2c6b-4dc1-9641-6bc4759abf49/70394031639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a908806-b252-4d5a-8f2d-f309d2da3703/jiresebesukuvozoziro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8024/3617/files/cells_and_tissues_chapter_3_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9634/6276/files/23293438893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/run_on_sentences_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/72375760297.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_off00006ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC9 5432 bytes
SHA-256: 846bf9f7ad88203f92f706916d6d07881555a4af8bfdc5ffb9816c3cd0ef8658
font_01_sfnt_off00008154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8154 10504 bytes
SHA-256: ee13d1f4b5d4611fe9525383691ced00e4d3d51094f93d26048ba0067d3425de

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