Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b5c75a6f1583bb…

MALICIOUS

PDF

38.4 KB Created: 2020-11-07 13:39:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f7d40dfcbb2c6d9bd45c457302877ead SHA-1: 40357213a5b1b360d7a97cb288fe60e475e0eb46 SHA-256: d8b5c75a6f1583bb4e493b78e830b7904a3bbde8745e64e4edbd9b6279f7e010
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=dave+matthews+band+symbol PDF link annotation
    • https://safikevobajegev.weebly.com/uploads/1/3/4/3/134352312/tatidebo-zejulazuvob-logavo-gilapa.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/77af9e3ce.pdfIn PDF document text
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/rorofexi.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/rukisej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392451/normal_5f918da9df275.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/2249666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5f914c7455810.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/8dc51d124.pdfIn PDF document text
    • https://bubosetew.weebly.com/uploads/1/3/4/5/134515161/a4abae9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rejuxakol.files.wordpress.com/2020/11/82888458682.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/vipovonewepofoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/pojofanumutupodut.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_off00005759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5759 5364 bytes
SHA-256: b283bc8e074c81359843acf65eaf19f03b966b17eb22b8918fff07b0440ea943
font_01_sfnt_off00006990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6990 10468 bytes
SHA-256: e50570e3346bfaa3c064aa4b04a8770963aea4aa7e187b090b0adb46ad0e7c45