Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2a0fd8ded6dff6…

MALICIOUS

PDF

48.7 KB Created: 2020-10-01 03:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fcf2379ffe64219a6ce1f59edb7b0e3d SHA-1: be8bc5424b6f526c29543c7d99cba519a8fdb8e5 SHA-256: ea2a0fd8ded6dff67c5390f9cc3608713b25c3c2b986f72f6430b47ff7e4ba0e
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=inspiring+quotes+for+students+pdf In PDF document text
    • http://files.kc4450.com/uploads/1/3/2/6/132681450/8618039.pdfIn PDF document text
    • http://nagagadu.bigwalnutfrench.com/uploads/1/3/1/4/131411150/2808714.pdfIn PDF document text
    • http://norir.bluebelltrail.co.uk/uploads/1/3/0/7/130739297/sonem-viregobodapir-lisaxadove-kifubun.pdfIn PDF document text
    • https://site-1037029.mozfiles.com/files/1037029/83658133949.pdfIn PDF document text
    • https://site-1036997.mozfiles.com/files/1036997/tilotizowudaviv.pdfIn PDF document text
    • https://site-1037870.mozfiles.com/files/1037870/52914084144.pdfIn PDF document text
    • https://site-1039161.mozfiles.com/files/1039161/dupelozijelakojoz.pdfIn PDF document text
    • http://files.timothybrownmusicnyc.com/uploads/1/3/1/3/131379343/8233653.pdfIn PDF document text
    • http://files.guntersvillelionsclub.com/uploads/1/3/1/4/131407135/wewilemutinaxin.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/5514fc5c-823c-46b3-a379-5bf5fb6b5c2c/guzubifeweruwulefivazegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f974d4ca-8dad-4c1f-98cb-c2bdc6de198c/32134956095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e8cee5-352e-44fb-a254-d57329b48593/vejiwofitixixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b80fa3d0-a219-4a66-ae0b-8b8cb9aec43b/40092127545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f85deb-fba3-4656-8680-6856c4f7379b/6626901874.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_off00008055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8055 5028 bytes
SHA-256: a065287b4e6fb2b3242caf7ff7ac9d854d85e43d66911bcbb8f530a28ac1b3b7
font_01_sfnt_off0000917a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917A 10752 bytes
SHA-256: 4b216d50ec3c0302a0a5a0238870ebe27b537a708fc460cf8231124184e00ac3

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