Malicious PDF — malware analysis report

Static analysis result for SHA-256 8907d3bedbc715cc…

MALICIOUS

PDF

37.9 KB Created: 2020-10-01 16:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8b0d2e832dc8ba3eeb8e89b7e2f2ccb0 SHA-1: 6128b439f9a9a8394d59f8cc2d428ce99aee775c SHA-256: 8907d3bedbc715cc66561c56b8f18966ad4a6cc61d6155b118744d29b4a9848c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=california+focus+on+physical+science+textbook+8th+grade+pdf In PDF document text
    • http://files.carriekellyk9.com/uploads/1/3/0/8/130814133/kojenoj-rotifofowovet.pdfIn PDF document text
    • http://xivejiwor.theconferenceofbirds.com/uploads/1/3/2/8/132814439/sixugalifapawiteki.pdfIn PDF document text
    • http://ritoko.tasha.golf/uploads/1/3/0/7/130775826/lesomejo.pdfIn PDF document text
    • http://files.traceylichnerphd.com/uploads/1/3/1/3/131380558/6be5ec71c7571.pdfIn PDF document text
    • http://tazuxa.workofartstudios.com/uploads/1/3/1/8/131856643/742809b1b7.pdfIn PDF document text
    • https://site-1037238.mozfiles.com/files/1037238/tozadufavu.pdfIn PDF document text
    • https://site-1036868.mozfiles.com/files/1036868/numipugidixututol.pdfIn PDF document text
    • https://site-1038762.mozfiles.com/files/1038762/kugor.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/478a6c3e-3147-480d-8374-1b36fd5d803d/falonapakajupobapike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102ffe62-27aa-45c1-873a-4194d95a8f17/69668195729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01be5046-bc45-412f-94d2-281c0efab8ca/52256100438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7365605d-018c-4feb-9787-39271db1dd01/7107605012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a62dff-75b5-40ed-a514-637851a9cd71/26174378270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e5e52bd-730f-4877-a836-01f1a0e3655f/63768794845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eaf932b-fd66-4d66-95ff-d20e92387f06/lamidoxobek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a655881c-8c4d-4f43-a6d1-78566d2b3ab2/guzemuweritunopobasogifa.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_off00004733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4733 5892 bytes
SHA-256: b06128372f0eaf63a599d160af10e7bdc2460e20cea67b168ab8a05ee10580cb
font_01_sfnt_off00005b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3A 9588 bytes
SHA-256: c343d7de357c149a4019bb28235c521f6c816ec4362cc6202fde0c87fdebd53d
font_02_sfnt_off00007bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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