Malicious PDF — malware analysis report

Static analysis result for SHA-256 490441bfaf564be8…

MALICIOUS

PDF

46.7 KB Created: 2020-11-06 02:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 123dcac3ed666d559d8f5015cd3d0bba SHA-1: d18e5ce3e2356dd0b9916c4103f41b222305ecdc SHA-256: 490441bfaf564be8587b9d6cf7a1c84d9ba622dca52ff2d6be44d75ea83c9a5c
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=bobby+kennedy+speech+after+mlk+assassination PDF link annotation
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/xiwumomodib.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/denegawaminelera.pdfIn PDF document text
    • https://vukuzimina.weebly.com/uploads/1/3/4/1/134109202/9fb6006eefb092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_5f892dad75755.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/winepogor.pdfIn PDF document text
    • https://xulobefopit.weebly.com/uploads/1/3/4/3/134349373/vekalu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f8a51e997bfe.pdfIn PDF document text
    • https://gutomaxitokivi.weebly.com/uploads/1/3/1/3/131383747/suxijutosexeveloguw.pdfIn PDF document text
    • https://nudiwosesi.weebly.com/uploads/1/3/4/3/134317077/efbe013c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418565/normal_5f9fd81c5d077.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://uploads.strikinglycdn.com/files/cb70096c-45b5-4d28-bb52-fb726f46c1dd/lagezugi.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/25866467027.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/introduction_to_aerospace_engineering_textbook.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_off000069c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C0 5536 bytes
SHA-256: b7587e11f8f8fa02a37289becc517badc782e30c9a7409f9fec3e19c2609d5e3
font_01_sfnt_off00007c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5C 10348 bytes
SHA-256: 62765fbf5481cbada5cb1d1426e63de9ac49611de30782518e6f83b4fdd63c4d
font_02_sfnt_off00009fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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