Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6484559cd510b63…

MALICIOUS

PDF

47.8 KB Created: 2020-11-08 13:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a966f25c37b114f5117f06422a3540ea SHA-1: d5d6df2177fa99564e31d69c7c91870905ea6eeb SHA-256: a6484559cd510b634cc99dcc4577ba5eb4e03f9951cfafeb9c4c4365d75c6ad0
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://traffking.ru/aws?keyword=electoral+college+worksheets+for+students In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416319/normal_5fa261755ad91.pdfIn PDF document text
    • https://zosibikatojufo.weebly.com/uploads/1/3/4/3/134382834/2151278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f889d15a1c7e.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/vidigil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405409/normal_5f92400f21fce.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/netodadofabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f895d0a10c72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/najubu/18008916514.pdfIn PDF document text
    • https://zolikaf.files.wordpress.com/2020/11/79489623638.pdfIn PDF document text
    • https://kovipuwixo.files.wordpress.com/2020/11/42635769341.pdfIn PDF document text
    • https://jogamoje.files.wordpress.com/2020/11/bahubali_movie_hd_1080p_video.pdfIn PDF document text
    • https://fofarilem.files.wordpress.com/2020/11/vendaje_en_espiga.pdfIn PDF document text
    • https://balapep.files.wordpress.com/2020/11/87a_rebate_for_fy_2017-18.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_off00007b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B26 5396 bytes
SHA-256: b3ef09a24e2c821efb850b0db7a3c1bc74f7e6f853da3f197d6f3880700d9d5a
font_01_sfnt_off00008d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D90 10876 bytes
SHA-256: bc1e13ccb77c564a7d189f4bf0e337682e97ae4b44643f4c8e544ac3cbedfc6a