Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1e91c5524816e6…

MALICIOUS

PDF

41.7 KB Created: 2020-11-08 04:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d2f7a22304b67958cc5894231f97658e SHA-1: 495731acabcd93c057940e8c550e63686c06c60b SHA-256: cc1e91c5524816e6198b53bcfea6f367bbd740e52d0eeb4de8a517281eb7fa91
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/123?keyword=skeleton+cut+and+paste+worksheets PDF link annotation
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/2361592.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/nukexifepejisox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_5fa06d6a3e23d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456379/normal_5fa4a749e2fc2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://vuvovugevuvo.files.wordpress.com/2020/11/vapizon.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/lipujogaveluxoku.pdfIn PDF document text
    • https://ladisasezo.files.wordpress.com/2020/11/43699064907.pdfIn PDF document text
    • https://fusafob.files.wordpress.com/2020/11/5832454523.pdfIn PDF document text
    • https://dolenukiwiwe.files.wordpress.com/2020/11/catolicismo_romano_loraine_boettner.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_off00006325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6325 5420 bytes
SHA-256: 264668a0dec8fc0591804e47d3c31aafd95c3c846f7c640eb0fa76bc52d09f68
font_01_sfnt_off000075a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A1 10732 bytes
SHA-256: 8896d7b9cb1a252dd0eb82cfc490799f42f66ce958aad9e41a419518a031fee3

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