Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e8167a27099670…

MALICIOUS

PDF

35.0 KB Created: 2020-10-09 09:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 34807026faeb79c413c8ddce36f001d3 SHA-1: bd759128c9ffd00cac8b207dd0fd8f51e75aac3e SHA-256: 98e8167a2709967019294252200956e667cd76050298497c2b57f8baf609a01f
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=holt+life+science+textbook+pdf In PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/49872275254.pdfIn PDF document text
    • https://site-1039698.mozfiles.com/files/1039698/85137070767.pdfIn PDF document text
    • https://site-1043606.mozfiles.com/files/1043606/gurafowojimalotuxinadap.pdfIn PDF document text
    • http://files.theateradventures.com/uploads/1/3/0/7/130775229/motos-galubifob-wivuzo.pdfIn PDF document text
    • http://sadotud.mx.acybrown.com/uploads/1/3/0/7/130775195/zagigito-lixejenovetani-nadom.pdfIn PDF document text
    • https://site-1036874.mozfiles.com/files/1036874/tonibir.pdfIn PDF document text
    • https://site-1043119.mozfiles.com/files/1043119/nitege.pdfIn PDF document text
    • https://site-1038827.mozfiles.com/files/1038827/68640339085.pdfIn PDF document text
    • https://site-1037839.mozfiles.com/files/1037839/zufuliguzibogibi.pdfIn PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/dokapomaxobarajuxoxijema.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/dcdfc4ce-fe76-4e42-a66b-652c73287ece/danume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e8c84cc-d0af-489d-8287-552993f161b9/68802584822.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_off00004c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C79 5076 bytes
SHA-256: ee0f2ad291f5ecb18d76034f86c744bdf0d054ab91078dec8755dd9f41fd5b03
font_01_sfnt_off00005dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD7 9916 bytes
SHA-256: 33156e24471da9417c3e6238982e2bc678a94d3d80105d4d8720be1c6d9c758c