Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b34cbaf3c940c0…

MALICIOUS

PDF

38.1 KB Created: 2020-10-02 11:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f2ec18034d0c2575c95233d874b6e08a SHA-1: 40460cb37c8c76bfc4bba2a4cb7f7a2a7a90e52f SHA-256: 59b34cbaf3c940c0cbe5aef001dcc040681d1e51574a24baad75c2e5a5675223
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://gettraff.ru/strik?keyword=open+mind+beginner+student+s+book+pdf In PDF document text
    • http://funafigo.twfive.net/uploads/1/3/2/3/132302921/4537065.pdfIn PDF document text
    • http://xepitu.johnzion.com/uploads/1/3/1/3/131379730/kalovigolufijesak.pdfIn PDF document text
    • http://files.savannah-aerials.co.za/uploads/1/3/1/4/131437074/9f6d290a.pdfIn PDF document text
    • https://site-1039800.mozfiles.com/files/1039800/wusekigovagomeg.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/moxekutiwuboxe.pdfIn PDF document text
    • https://site-1036730.mozfiles.com/files/1036730/12848913115.pdfIn PDF document text
    • https://site-1039829.mozfiles.com/files/1039829/72910009466.pdfIn PDF document text
    • https://site-1040145.mozfiles.com/files/1040145/55008844189.pdfIn PDF document text
    • https://site-1037221.mozfiles.com/files/1037221/warorez.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/suzil.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/40bd219c-979b-4fda-9205-4ed13c817295/rawiravanelunovoruviwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d45730-fe0f-4a3f-8839-f5a9386feefe/79301786703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c37c735a-e163-430a-8a94-0ec2c9a67251/tinawulizoferodazutur.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_off000055d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55D3 5348 bytes
SHA-256: c985e09e9463b1c5037dce65d14ef47a7fa55688a03c69f81029391637c5e283
font_01_sfnt_off000067f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F1 10552 bytes
SHA-256: 0c48925eefb8e198e6330c43bab779e74893a5fca66397b8fbb0c9e1ae710888