Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba57cdb020f08fef…

MALICIOUS

PDF

38.6 KB Created: 2020-11-07 01:24:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6be37842e7f485ebf8a36f82d8892962 SHA-1: 976c8c85b6653caa7798da3d833b1e9762b8e24b SHA-256: ba57cdb020f08fef58a6237060e9a0084fc2f449b350d18dab00681f012924f9
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://traffine.ru/123?keyword=morris+grove+elementary+staff In PDF document text
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/1ecf861cd677a0.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/najuwik.pdfIn PDF document text
    • https://bowilidorufe.weebly.com/uploads/1/3/4/6/134603038/3577997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410459/normal_5f94d778b19a4.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/zasufanufufimikozo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/bubexitel.pdfIn PDF document text
    • https://rovafola.files.wordpress.com/2020/11/bruce_lee_le_jeu_de_la_mort_streamin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b954698-9ef5-4512-9267-c5f019a7a15a/5804229379.pdfIn PDF document text
    • https://fepefik.files.wordpress.com/2020/11/48421735761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26547cba-a5d6-46a4-ac40-609de368dcb4/sample_response_to_foreclosure_summons.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/wagawubodugo.pdfIn PDF document text
    • https://tilokas.files.wordpress.com/2020/11/74634430094.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000576e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x576E 5252 bytes
SHA-256: 22f1e6269de42083ba4ce469d947ac6ad0b701fd0ff6c9ca3fae5fbff7f65637
font_01_sfnt_off0000694e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694E 10404 bytes
SHA-256: 6504739c79bd537d3664f58ad7e4899c01dddc445635e2daf7c6e9edd4ed0145

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