Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba33c96da2c6d5a9…

MALICIOUS

PDF

39.2 KB Created: 2020-11-08 12:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6b0d3008435c9b5478503a3ca158ea7e SHA-1: 6fe69d0e11fa170af0e14b392d7e3bdbf7882b9a SHA-256: ba33c96da2c6d5a90c83836baed0413519b5494618ae00df305e9233d98d8795
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?keyword=hp+spectre+x360+system+fan+90b+2017 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5f8c192d6fbaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409096/normal_5fa34e100620a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_5f94a2c531806.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wirovoxujeme.files.wordpress.com/2020/11/belapes.pdfIn PDF document text
    • https://zobeseregawu.files.wordpress.com/2020/11/68108985599.pdfIn PDF document text
    • https://vofalop.files.wordpress.com/2020/11/electronic_devices_and_circuits_by_allen_mottershead.pdfIn PDF document text
    • https://vefaxex.files.wordpress.com/2020/11/6346994850.pdfIn PDF document text
    • https://boxogaxixum.files.wordpress.com/2020/11/dream_on_club_midvale_utah.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/gabizagamumarokidatanum.pdfIn PDF document text
    • https://bawesos.files.wordpress.com/2020/11/behaviouralism_and_post_behaviouralism_in_political_science.pdfIn PDF document text
    • https://fudatagito.files.wordpress.com/2020/11/77309156682.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/nice_lyrics_beyonce.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/lodebukiworidu.pdfIn PDF document text
    • https://wozexot.files.wordpress.com/2020/11/jedegiwegagote.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_off0000584c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x584C 6280 bytes
SHA-256: 53f7263c054cf971bb5d9eaee28d3247810ebb6e422700be0629c7957763e538
font_01_sfnt_off00006d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9F 10144 bytes
SHA-256: 271f773e261df9c9c0b272d0135d4bb27f36fd1b9f2443311422f33073917e96