Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cea3e7a622a74d8…

MALICIOUS

PDF

45.0 KB Created: 2020-09-30 07:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6a8aeb425f3f4939762beccf165e8517 SHA-1: 2265443153c1d9ef7d3b81d30f35cc0cebaeb0e7 SHA-256: 5cea3e7a622a74d814df844a013f36dc9137a0381dac58739113fce5b9b67935
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=definition+of+secondary+research+pdf In PDF document text
    • https://site-1036783.mozfiles.com/files/1036783/mexolomokudolabatajam.pdfIn PDF document text
    • https://site-1036781.mozfiles.com/files/1036781/mupofekutugala.pdfIn PDF document text
    • https://site-1036871.mozfiles.com/files/1036871/jixogaxos.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/10810656882.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/35781931634.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/zuxotazetup.pdfIn PDF document text
    • http://regebuf.coldsnap-studio.ca/uploads/1/3/0/8/130873922/vuxakogusuxalome.pdfIn PDF document text
    • http://files.wilsonswebpage.com/uploads/1/3/0/7/130775712/vikobumezilujeb_subuzel_lizipilof_jakajexani.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/68b020f8-fa22-460d-9a6b-87ead9e6e8f0/20576898014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a7e7cd-3720-491b-bf90-34a780766540/nanulefixojoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d976e4-6fca-462c-8371-5b20192e67b5/16996260523.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_off0000724e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x724E 5312 bytes
SHA-256: f35163d41e0d9cd59bdd6b89bb9c013e3d9e163024971c676aea9e2f18427ef0
font_01_sfnt_off0000846c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846C 10168 bytes
SHA-256: b7b6f9910d81dcaa40d402f20ec0c0d40b28a6cde8c91afcf8462c0ee0318878