Malicious PDF — malware analysis report

Static analysis result for SHA-256 559bd0c3e5717fe8…

MALICIOUS

PDF

70.9 KB Created: 2020-11-08 17:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 352b3ca34ed87507e4324b425d5adacd SHA-1: d8f1d1f77d15e2673d94814d54c9ceec866dbf90 SHA-256: 559bd0c3e5717fe8687748cd18925012e46cd8dad516015d13b8891c584f530a
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://trafffi.ru/123?keyword=madonna+into+the+groove+lyrics+and+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f89ceda16b25.pdfIn PDF document text
    • https://pexulowiseguwuz.weebly.com/uploads/1/3/4/3/134391342/kopepurogo-jogukebokula-waxefuf-xazobonum.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/kekitogur.pdfIn PDF document text
    • https://xamalebudeke.weebly.com/uploads/1/3/4/3/134326767/5196062.pdfIn PDF document text
    • https://delularisif.weebly.com/uploads/1/3/4/4/134482541/pesud.pdfIn PDF document text
    • https://xamurifepugep.weebly.com/uploads/1/3/4/4/134484548/2073870.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/fa4691b8-5adc-4ba5-aee8-2fab942676f5/nuwigoguredivumov.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/ggplot_manual_legend.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc32f152-42b5-4f39-9b8f-dda3224210a6/25781004320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a3f991-e877-4837-98e0-5a910275217b/guruzisunogabamusod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c81f0d65-b39c-4173-a098-a8f10be4257e/6489924168.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB1 5368 bytes
SHA-256: b17ce8046a3fc6f87ff60329ee54c247d32092a9175f46b48720b937b846efe8
font_01_sfnt_off0000d007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD007 12992 bytes
SHA-256: fcbc388d1f3730ab12c6773c5975b3d76519000b1d205171b7972f0d84809e03
font_02_sfnt_off0000f912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF912 16120 bytes
SHA-256: 15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208

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