Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef10d58a7144fa65…

MALICIOUS

PDF

37.1 KB Created: 2020-11-09 05:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 936668e93d6bb05a4d5db47f1d1e7fce SHA-1: 2d2c405130f7fc7ed84045eb51a8151a8654ae9d SHA-256: ef10d58a7144fa651ffdfa44886681fc88925792ad3aae446a53dd1092c04e53
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafffi.ru/aws?keyword=hex+editor+apkpure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5f9bda01ca728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_5fa5fd9f4d2e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394068/normal_5f90f500cf85a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427103/normal_5f9b07e28d030.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://demoxugu.files.wordpress.com/2020/11/63796454631.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/57611665316.pdfIn PDF document text
    • https://xokoxaw.files.wordpress.com/2020/11/83211703596.pdfIn PDF document text
    • https://pubosepiko.files.wordpress.com/2020/11/que_es_esquema_corporal.pdfIn PDF document text
    • https://nuvinifiraf.files.wordpress.com/2020/11/mogofemejakowemuz.pdfIn PDF document text
    • https://ziziwugo.files.wordpress.com/2020/11/13837408849.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/dukekifoxojulena.pdfIn PDF document text
    • https://vokagewajene.files.wordpress.com/2020/11/disod.pdfIn PDF document text
    • https://rebusudes.files.wordpress.com/2020/11/31763742790.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4484 4612 bytes
SHA-256: 3d52bea424e1020dbbe9ebd02e791c655e084e1efd68ddec2b41d6c1d43e41a7
font_01_sfnt_off00005442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5442 11020 bytes
SHA-256: 47f36d8c6d1b6303ea35592cf4fa50f40d1ce1272f5583571848764c3685f4e7
font_02_sfnt_off0000785f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x785F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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