Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5ec0ab11a9af33…

MALICIOUS

PDF

46.6 KB Created: 2020-11-08 09:11:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: b2e401b494ac8521d3ee4aee339cc221 SHA-1: dfd4970e07b2c44159db66c2baf0752ef408f1c9 SHA-256: 6c5ec0ab11a9af333164af15409dccdf15028980318d37005194578c0ab83bc7
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/123?keyword=kodi+fire+tv+apk+download In PDF document text
    • https://bepopasexib.weebly.com/uploads/1/3/4/3/134356469/9115163.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/tuzuvebijuk_zumasozen_xumidazi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5f9b05141a376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5f8c2211bebf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f88717ce9725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403951/normal_5fa1a4ed504d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f873cf4a5141.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://konomalipu.files.wordpress.com/2020/11/83833894442.pdfIn PDF document text
    • https://zugipokojer.files.wordpress.com/2020/11/66381139889.pdfIn PDF document text
    • https://juzikarew.files.wordpress.com/2020/11/juwabitarerekejupuwarutij.pdfIn PDF document text
    • https://wejogude.files.wordpress.com/2020/11/niwasegini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b2f203-d5b0-42ce-9954-119f04ca75b1/download_anime_mugen_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6365f071-8358-4b26-8082-cb0c50c28c07/5995776924.pdfIn PDF document text
    • https://fajogamapu.files.wordpress.com/2020/11/cancionero_catolico_para_misa_letras.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_off000074ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CE 5040 bytes
SHA-256: 398a7972df8783a5dc1623248c640f4bee1ad4dadcd1d8490ebf01db5bc92360
font_01_sfnt_off0000861f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861F 12272 bytes
SHA-256: 4e0bd196dbce9ec139ee02b59aabcee78258151d8b4efd41a671144a00a85c6f

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