Malicious PDF — malware analysis report

Static analysis result for SHA-256 19dcc60b2ecea854…

MALICIOUS

PDF

48.4 KB Created: 2020-11-05 12:39:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3e398662a24ac1db34ec403490b5d93e SHA-1: 34a59aaf80f5216f55dfc1359952fc797b04d45a SHA-256: 19dcc60b2ecea8547a1977aea9342b9c3d4af2f6005cec63376638da88e527c5
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://cctraff.ru/123?keyword=league+of+legends+hide+and+seek In PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5f8ff0b64b712.pdfIn PDF document text
    • https://mosodujisar.weebly.com/uploads/1/3/0/7/130739504/4ffb9762482.pdfIn PDF document text
    • https://sitawixabebel.weebly.com/uploads/1/3/4/3/134319036/606da.pdfIn PDF document text
    • https://navubenawegef.weebly.com/uploads/1/3/4/3/134320789/nimixorepinogokasof.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/5f04e93ae.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/8c0c5262-4ddc-4407-8e33-66a8d1c2a9b6/comprar_ropa_muscletech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a607d9-0a57-45e6-a043-6834a8a49bd8/sin_city_deciples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/101333e8-807e-4b52-9ffa-6400039c25bf/56547780298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5135fb54-dd80-40be-b41e-5a86252bbeaf/joxafavufukupubiraxob.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/free_sewing_books.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/gizudud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53fd651a-12cb-42e0-be2a-923939381d18/zesirabikotibus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eafa13c3-7f87-4afd-b5e3-39bcc17a512b/lemimuzitirox.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_off000068c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C0 5080 bytes
SHA-256: e96e1a54451c30fc32fcfe562b5a4ec7db2c192b4ba354edbb3fa70385ab7d4a
font_01_sfnt_off00007a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A14 10952 bytes
SHA-256: 8b6723f4f55e8da6916a9082d7a0428a0be303fe00efa690bdb870b5434c1002
font_02_sfnt_off00009fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAC 16092 bytes
SHA-256: 5d067f3ed25c947100d6e11befc4ff8f2526c29946dd398e4c33d9c92d35bad5

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