Malicious PDF — malware analysis report

Static analysis result for SHA-256 56453a83a06a1dcc…

MALICIOUS

PDF

41.3 KB Created: 2020-10-09 16:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2c46af8056060121ea8257d300f8a6d9 SHA-1: 8e0d49ff3ee457916587a6caa092c4ec3324617b SHA-256: 56453a83a06a1dcc537b66474f741a4c01d53542b5de656d41873be4b12fea7e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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=line+graph+worksheet+pdf In PDF document text
    • http://files.bethinkcreate.com/uploads/1/3/2/7/132740218/70bd1ff781.pdfIn PDF document text
    • http://files.envoypeace.com/uploads/1/3/2/6/132680907/badafije.pdfIn PDF document text
    • http://femoni.stephenvince.net/uploads/1/3/1/1/131164312/motatirajujira.pdfIn PDF document text
    • http://files.macofmelbourne.com/uploads/1/3/1/4/131483138/b513738d50f7d.pdfIn PDF document text
    • http://kowidom.samanthajade.co.uk/uploads/1/3/0/7/130738797/satavizitame_mujub_vifoxij_lagiw.pdfIn PDF document text
    • http://jovew.evangghana.org/uploads/1/3/1/4/131409546/639331.pdfIn PDF document text
    • http://files.iamlovedministry.com/uploads/1/3/1/6/131637719/6946582.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/b677ee2b-3055-498d-81b0-84f528573a6c/piwixekuwan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2bd0cb3-4645-4e77-a135-782b3302c7cc/zadopawuril.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c4baf0-975b-4c63-853e-4149cb4dee21/depewamiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08476790-52f2-411b-8d02-66ae78e13146/fifiwavepagiwopob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/447a1833-5496-4569-bedf-efd6a03d63db/zogot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3464b5e-87a6-4c82-b534-75da1bb78617/rogivado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a0322a-65cf-4b03-a1ac-915e4eb80bb8/71475718564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d10697f-89d0-4e6b-bbfe-86a7348d8805/35874436457.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_off00006354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6354 5368 bytes
SHA-256: 691f29af54ce3a60edc4118293569e0f734af158b1408d9bd56e9b2ef6db71c1
font_01_sfnt_off000075ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AC 10324 bytes
SHA-256: e9edbef2719395b685f298c7792728316fd71de448796b699de11114ef499442

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