Malicious PDF — malware analysis report

Static analysis result for SHA-256 5396b26f97e20bc5…

MALICIOUS

PDF

41.1 KB Created: 2020-10-05 22:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a0102b7097e56c1db285dc95556dc358 SHA-1: bddcf95f36f3cb77ad8a6b80706cdf9a4f322ac6 SHA-256: 5396b26f97e20bc5f14884673e42d307c3166ae86717da306ede9cb177c1c802
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=grinding+it+out+ray+kroc+pdf In PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/vaxalapimifu.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/27403379936.pdfIn PDF document text
    • https://site-1039162.mozfiles.com/files/1039162/36813047564.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/xowikamatenibomir.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/pajitukopu.pdfIn PDF document text
    • http://files.woodcreekyearbook.com/uploads/1/3/0/8/130814245/673936de50f53f.pdfIn PDF document text
    • http://files.tasmantranscription.com/uploads/1/3/0/9/130968921/jafitaporel.pdfIn PDF document text
    • http://wedesum.zionaquino.com/uploads/1/3/0/9/130969959/9352935.pdfIn PDF document text
    • http://files.makeworthmarket.com/uploads/1/3/0/8/130813516/fefunebomi_fobatiroluvisu_xupotitove.pdfIn PDF document text
    • http://files.indiancreekwma.org/uploads/1/3/1/8/131856723/xoguvave_supejol.pdfIn PDF document text
    • http://kikovor.southcoastnutrition.com/uploads/1/3/1/3/131379699/xebevaxupumijum.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/761ef202-4966-462a-83b4-4daef3a4d924/53618638626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d620f45-6523-4cb0-b922-71fb207e27f5/82106978565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a5ffb0-8c2d-4115-a85b-a28162cb9fd4/vumirulobadaripujawaved.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d351b09-a945-4f9d-a6bc-5691d417d633/sovunurulifaxixeteja.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_off0000569c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x569C 5072 bytes
SHA-256: 91722c722130c2152f05e0eda9a21a63b76225391be4ef49c564f7e16057c4e1
font_01_sfnt_off000067f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F8 9752 bytes
SHA-256: 210fefa01946baca9168ccff8b0772ccd84cb98f00ec34c6352270445151e563
font_02_sfnt_off0000893a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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