Malicious PDF — malware analysis report

Static analysis result for SHA-256 be497b5d1e0451b6…

MALICIOUS

PDF

39.4 KB Created: 2020-11-05 19:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: d0c5abdfb7fa70c5cf34412bc78a8a40 SHA-1: af703bd3a0f3b6db1ba0c515ca4600e852fec7ce SHA-256: be497b5d1e0451b6c5b9f12108cb1674b12dd30f8b2fb827aa71ffb1bf86b64d
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://traffking.ru/123?keyword=tws-17+owners+manual In PDF document text
    • https://zejibafubetu.weebly.com/uploads/1/3/4/1/134108860/3645420.pdfIn PDF document text
    • https://zubujaxu.weebly.com/uploads/1/3/4/5/134585886/9592520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f87e55a77c48.pdfIn PDF document text
    • https://zufesuvagudinaf.weebly.com/uploads/1/3/4/3/134321689/62ad1f8ca.pdfIn PDF document text
    • https://rosofofupamufi.weebly.com/uploads/1/3/4/3/134364257/rirotizilinaviwerup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f97f92f18500.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/webitim-zasulorozurame-tujezud-reguxob.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/3409757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5f8de1be33742.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/49480400066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/8482/1681/files/nuance_power_advanced_1.0_download.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_off00005ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE4 5036 bytes
SHA-256: 416000fc29f5a55c2a22779483429e92283faa7d1e1113abbb43a4cee221a21e
font_01_sfnt_off00006e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0A 10428 bytes
SHA-256: 901f7af43364d4eaec0900262bcf86edaf3748c3f7a7d61e859ad0ca75824911

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