Malicious PDF — malware analysis report

Static analysis result for SHA-256 000f5b95ea35c8c7…

MALICIOUS

PDF

52.3 KB Created: 2020-10-23 05:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: a9a6ff4155148153748838887feff912 SHA-1: 6d7d08304d171ac9e586552b3e90a106fcdb8073 SHA-256: 000f5b95ea35c8c7a43623cc68459de1bcb5a446b795ef5e1faddc82e0411f96
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/aws?keyword=habanera+piano+pdf In PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/vasawinozi_panumazowisaze_tujaponezibino_wajivuvoxejo.pdfIn PDF document text
    • https://nirejabepifu.weebly.com/uploads/1/3/4/2/134266024/jafagoserun.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/bozobemazu_xilubojipikex.pdfIn PDF document text
    • https://rokejowavati.weebly.com/uploads/1/3/4/2/134265467/wugamobepavaje.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/8452231.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/e23634b510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f87008892136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f90c76ada55f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5f91fc3a44dff.pdfIn PDF document text
    • https://buwutele.weebly.com/uploads/1/3/4/4/134450545/joluloparibobi.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/5011088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5f8c069dc1bfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f87ce8458889.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/memul/mitifevinuw.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_off00008f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7D 4928 bytes
SHA-256: e24e48008e6330dc0b673ac6f4bc1c20cb94da8d564c0830476bf870b6ef05b0
font_01_sfnt_off0000a046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA046 10812 bytes
SHA-256: 4a28e3bfde82f9b12e6bc9aba13e9b36d58fcfefeef838f8b0dcafc051cd870f