Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f9272d042a2e34…

MALICIOUS

PDF

42.2 KB Created: 2020-10-04 06:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: db1491609b63654df7540d5c0589cc0e SHA-1: 7ae9a323f795d364b3c216ca755024f307922e21 SHA-256: e0f9272d042a2e343b44fb7dd3a43fded0e635c6ae98ab781bbab0111bd8a904
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=trove+rarity+levels In PDF document text
    • http://files.hopewellcompanies.com/uploads/1/3/1/0/131070485/be771c4b7f395b1.pdfIn PDF document text
    • http://fagege.lavingtonurc.org/uploads/1/3/1/3/131398134/bagik_bamikuf_kogerogi.pdfIn PDF document text
    • http://files.reisbordsclass.com/uploads/1/3/0/7/130739474/sezopunetisapa-bojemomivulikaf-jowizanelo-lizabelamib.pdfIn PDF document text
    • http://somude.yournextapparel.net/uploads/1/3/1/4/131453028/281d6d44a3aec6.pdfIn PDF document text
    • http://meruwil.lmc-photo.com/uploads/1/3/1/6/131606127/6173587.pdfIn PDF document text
    • http://files.digirhetorics.org/uploads/1/3/1/6/131607346/tanaloxine-sezavef-tesenot-xuwus.pdfIn PDF document text
    • http://files.nmffa.org/uploads/1/3/0/9/130969819/deniz.pdfIn PDF document text
    • http://files.emeraldis.org/uploads/1/3/0/7/130775288/sobib.pdfIn PDF document text
    • http://files.declared2020.com/uploads/1/3/0/7/130738622/1784879.pdfIn PDF document text
    • http://pesaz.keyconceptslearning.com/uploads/1/3/2/7/132740458/5abf063505a.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/16f7da28-f519-4f21-9bf5-f5d341c8bfd8/wagum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f25346-c218-4468-9304-380cede1487b/16633522539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcd77a2c-dbe8-478e-ba18-3247765ebb7e/94288458639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c539053c-c94b-4554-b092-a84a906f7427/17944620588.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_off00006823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6823 4792 bytes
SHA-256: f89ba14a44a93fe2a073b1fd2afb5a68a6d9234daf55aaec3db481ae27b82469
font_01_sfnt_off00007888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7888 10568 bytes
SHA-256: 8bed86215e3cce8bf7f6c1d3d6da4af97b30478d09cec59964f1ad5bf7cf43ca