Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e4a322ca18ef87…

MALICIOUS

PDF

44.2 KB Created: 2020-10-10 09:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: c20521c9051e818a5e353bb11076f3d7 SHA-1: 5b3bde829411c9a6434fed16e2ca605e248eefb3 SHA-256: 55e4a322ca18ef8744423cfdf9b28e1aed8cefb89d7460f0a6366553de0a628e
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=the+shunned+house+monster In PDF document text
    • http://gojuguvu.gatewaybehaviour.com/uploads/1/3/1/4/131438800/ziwubazuguziwemaka.pdfIn PDF document text
    • http://mazume.davidgoldsteindesigns.com/uploads/1/3/0/8/130873851/ribitilufo_geberok.pdfIn PDF document text
    • http://files.lavoratodesigns.com/uploads/1/3/0/7/130739214/fosezifumusizumow.pdfIn PDF document text
    • https://site-1040879.mozfiles.com/files/1040879/13915365316.pdfIn PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/lilirerumoxipatovoliziduf.pdfIn PDF document text
    • https://site-1038390.mozfiles.com/files/1038390/pemovikevipenozi.pdfIn PDF document text
    • http://lilile.foreverhorsecrazy.com/uploads/1/3/1/4/131437619/zuvip_jomexepelixi_memizuje.pdfIn PDF document text
    • http://files.abetamassage.com/uploads/1/3/2/8/132815882/5703228.pdfIn PDF document text
    • http://files.fultonucc.com/uploads/1/3/1/4/131454090/bulobalivosuwef_digedapu_sefusolewaxo_pagepak.pdfIn PDF document text
    • http://files.hangyungltd.com/uploads/1/3/1/3/131380558/bovuvelanotuxetupa.pdfIn PDF document text
    • http://velusupid.destinedance.com.au/uploads/1/3/1/3/131380344/lopad.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/2bcc87de-8b98-4280-aa04-5aa7b4d6e298/vakilajuzitukiduwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d85054fe-7bd3-4ccc-8543-a571077da9c3/rupowevemejekeme.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_off000071a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A8 4772 bytes
SHA-256: d114d9e62a94e249b1763bb5dafbde72dd0b8c712a64f32f330049c7c9c1aa73
font_01_sfnt_off000081b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B3 10128 bytes
SHA-256: 9bc298de45461b62f6dfd1f9b1318b8678eefd753aced7491300c172dbeb5f4e