Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ba23ca5f58a7d7…

MALICIOUS

PDF

59.9 KB Created: 2020-10-07 12:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bfce558bee27a0ec7d8cc6ccb394d105 SHA-1: e977cbc552a43ff14fd1f719ea148fc556769a21 SHA-256: 26ba23ca5f58a7d74f0fb52220a4260d17700a30d56c5ecb3f81de45f8bd91fb
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=agile+and+waterfall+hybrid+model In PDF document text
    • https://site-1039998.mozfiles.com/files/1039998/lidiwerijeboneta.pdfIn PDF document text
    • https://site-1039443.mozfiles.com/files/1039443/lovapunavob.pdfIn PDF document text
    • https://site-1048166.mozfiles.com/files/1048166/62662730070.pdfIn PDF document text
    • https://site-1036993.mozfiles.com/files/1036993/77418144735.pdfIn PDF document text
    • http://files.mymagicspoon.com/uploads/1/3/1/6/131606165/gudapa.pdfIn PDF document text
    • http://files.escapesdentaltv.com/uploads/1/3/1/4/131437823/pevoseregizuko.pdfIn PDF document text
    • https://site-1041672.mozfiles.com/files/1041672/86174331023.pdfIn PDF document text
    • https://site-1037227.mozfiles.com/files/1037227/16124864167.pdfIn PDF document text
    • https://site-1043800.mozfiles.com/files/1043800/51826797898.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/5757545c-fbad-4a0b-86f5-c3a766335a0d/lurapebabenosapezuvuzowej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace5aa72-929a-4117-82d4-fbcb807a32d2/jenugeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8bb1b98-fdbf-41cb-afca-567e90164c9e/kifadifemisivubopafos.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_off0000aa9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA9B 5464 bytes
SHA-256: 036261ce01c70532b3e76f1979b5b095e7c9eb8bc512dd0947ddd2a10270b0f8
font_01_sfnt_off0000bd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD27 11372 bytes
SHA-256: 02da274473cd8922aa995d8733c054a0beeb001ea1cae1937b284824508c0063