Malicious PDF — malware analysis report

Static analysis result for SHA-256 9038b15040c14eab…

MALICIOUS

PDF

41.6 KB Created: 2020-11-09 05:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3b8db3a7c1c795564bcfb42d5b11fb38 SHA-1: 5c43d3cc9d2d0f099aeaceeee01c36523cdc6282 SHA-256: 9038b15040c14eab22dde1e2c8b1a128c066d6487bb366c6b4665a4bf45e8c48
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=earn+to+die+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f8cc82036cd4.pdfIn PDF document text
    • https://rizebilawi.weebly.com/uploads/1/3/0/8/130814716/05ad6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f9e90d19bcf1.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/7509483.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xoxedoxiki.files.wordpress.com/2020/11/wepifegojig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91516ef8-6a17-42d6-a5a1-ffcc57680330/new_adult_film.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://rifuvusi.files.wordpress.com/2020/11/73337349583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6fe5c2-dc85-4ee9-b56d-bf94b0ca55a0/kolopedowabotatadugafi.pdfIn PDF document text
    • https://zizugojos.files.wordpress.com/2020/11/75011009632.pdfIn PDF document text
    • https://sevuropigo.files.wordpress.com/2020/11/34307858331.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_off000065d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 4732 bytes
SHA-256: 98ebf4fa0a1251ef53090e5b9247d69fdd2f0857ee6ca0c82d1c8ab22f1323cf
font_01_sfnt_off00007600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7600 10632 bytes
SHA-256: 5645e785a7e40c523d7d658df0f2247df88b3277922f20c6b8051a3cc06f11bf