Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7dad151131bd3cd…

MALICIOUS

PDF

43.5 KB Created: 2020-10-03 15:33:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1226574cebd9572f7e6ff94bb6d36b18 SHA-1: 186bf79ba6af71872f96c7e8b3ec97d3bba168ed SHA-256: f7dad151131bd3cd1ba1006da570dbc95ab3db526df5dc5260597e4d97b29b21
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://cctraff.ru/strik?keyword=pdf+annotation+app+apple+pencil In PDF document text
    • http://files.pcelpc.org/uploads/1/3/2/6/132683367/pegoxixowutun.pdfIn PDF document text
    • http://files.miradorkidsyoga.com/uploads/1/3/2/6/132681891/5968992.pdfIn PDF document text
    • http://files.amaefresnomadera.org/uploads/1/3/2/7/132740880/332988.pdfIn PDF document text
    • http://files.ffpdonline.org/uploads/1/3/0/9/130969082/732170.pdfIn PDF document text
    • https://site-1041613.mozfiles.com/files/1041613/kimebeke.pdfIn PDF document text
    • https://site-1037843.mozfiles.com/files/1037843/24893288945.pdfIn PDF document text
    • https://site-1038538.mozfiles.com/files/1038538/palelukonitekudununapofod.pdfIn PDF document text
    • https://site-1039156.mozfiles.com/files/1039156/61593414422.pdfIn PDF document text
    • https://site-1036751.mozfiles.com/files/1036751/81845340213.pdfIn PDF document text
    • https://site-1037169.mozfiles.com/files/1037169/9731467937.pdfIn PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/64685112903.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/083fbc80-3b7e-469e-9333-7b0dd0ced228/88862961264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e295006-350d-4d0f-bc32-e50dfdd62af2/81526326560.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_off00006b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B51 4876 bytes
SHA-256: 9d27b3957a0eb5376d2ce8e5c8b602048e64fe8ab4091c131aa2a9b9fef57b15
font_01_sfnt_off00007c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C04 10836 bytes
SHA-256: b4e4efc9330d8082a1dd60edb69e03a4552ff5b06a880cbd0bbd3465415de670