Malicious PDF — malware analysis report

Static analysis result for SHA-256 2772bd29ecf2fbf6…

MALICIOUS

PDF

40.6 KB Created: 2020-10-02 14:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c501cb6cd5d0434089a7ec313ca5db47 SHA-1: 84958d02117ffae4dded9ed61fc7c8d1e9247c77 SHA-256: 2772bd29ecf2fbf6cd18048c18f26e2bd586436b4a959db61fa14320e1e72521
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://ggtraff.ru/strik?keyword=dwarf+multicannon+osrs+guide In PDF document text
    • http://kagodopo.biglittlethingsfoundation.org/uploads/1/3/0/7/130775413/4341920.pdfIn PDF document text
    • http://fatovemu.nihc.ca/uploads/1/3/2/6/132683138/pezofugamokuk-fabipa-puzejulagog.pdfIn PDF document text
    • http://mabisus.waubonsievalleyorchesis.com/uploads/1/3/1/4/131438245/ba8172c4d2a3cc.pdfIn PDF document text
    • http://dijokix.nhvfd18.org/uploads/1/3/0/7/130739595/pewukewuxenamuv_tiwad_tuwudoguzolol_mopab.pdfIn PDF document text
    • https://site-1039730.mozfiles.com/files/1039730/96854177939.pdfIn PDF document text
    • https://site-1037882.mozfiles.com/files/1037882/gidipalodijolonilubumedub.pdfIn PDF document text
    • https://site-1037044.mozfiles.com/files/1037044/21929586718.pdfIn PDF document text
    • https://site-1039222.mozfiles.com/files/1039222/wafazisujerupunun.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/rurabini.pdfIn PDF document text
    • https://site-1039135.mozfiles.com/files/1039135/43035527268.pdfIn PDF document text
    • https://site-1036759.mozfiles.com/files/1036759/dejowevopurisawofumir.pdfIn PDF document text
    • https://site-1040293.mozfiles.com/files/1040293/muresovosoteregisizinow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000060ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60ED 5432 bytes
SHA-256: df1947d931f7ad2d5f93172b6dd78f372cd0530304780fc190419212ca11ce63
font_01_sfnt_off00007369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7369 10120 bytes
SHA-256: 3692ab188223a5b350ba04283e2ec6cad1c03dd476c4498b9a052cc3691f3a1f