Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e7429f320d14c8…

MALICIOUS

PDF

40.2 KB Created: 2020-10-10 21:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9009e2ccfa03032dcc75021a0266b2aa SHA-1: 8935b3b0fd82db4f6dbc3c0cdb2b524e930be91c SHA-256: 53e7429f320d14c8e8650cbceaa93d80bcb8d1de0b9dbc154180115d4fbec4ae
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=the+legend+of+the+blue+sea+episode+1+youtube In PDF document text
    • http://files.ihwisconsin.org/uploads/1/3/1/4/131408364/domuzi_pawimukizezuvuj.pdfIn PDF document text
    • http://files.michaelhelquist.com/uploads/1/3/1/1/131163898/371033.pdfIn PDF document text
    • http://files.emilykwon.com/uploads/1/3/1/1/131163492/693c3becee3.pdfIn PDF document text
    • http://files.wairarapamassagetherapy.co.nz/uploads/1/3/1/3/131383645/jolunateripemam_xeremevusejakox.pdfIn PDF document text
    • http://files.monicaariasmiranda.com/uploads/1/3/1/3/131379894/b499ab349233d0.pdfIn PDF document text
    • http://files.kwenchjuicetucson.com/uploads/1/3/0/7/130775796/xodelame.pdfIn PDF document text
    • http://files.pygmalionhousedesign.com/uploads/1/3/1/6/131608016/rukituxakowed.pdfIn PDF document text
    • http://files.lawsynagogue.org/uploads/1/3/2/6/132696249/tumosare-vetol-vugos.pdfIn PDF document text
    • http://files.frenchologie.fr/uploads/1/3/1/8/131856554/4992781.pdfIn PDF document text
    • http://files.dongpu.studio/uploads/1/3/1/3/131397973/d118d0d8a.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/a2bf4003-82ce-40b4-9f9b-69b6830c0bec/fovowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a351010-b9cc-4d7d-8fb7-88b748a5625a/62747515538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522b0709-b158-49e6-b2a2-487392725106/47845509642.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_off00005ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 5448 bytes
SHA-256: c2a045614c7f6a28287fd7a234891023f388790ad461575287770ec15251cf1f
font_01_sfnt_off00007160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7160 9968 bytes
SHA-256: f7b51d05e31bf357b86b590a725bbea824c062efbf6a715d15379e9a5b160944