Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef924e5e841ad23b…

MALICIOUS

PDF

49.6 KB Created: 2020-11-08 01:58:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 56da7662efdec3710c285b91461da02a SHA-1: 4c04ba983d7786a97e07a5b56b9a1fa05212c09f SHA-256: ef924e5e841ad23b7b15ce2fe77062d418a33816a71c2f50c0dffde5c060d15b
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://traffking.ru/aws?keyword=metal+detecting+arkansas+2019 In PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/xalupesivile.pdfIn PDF document text
    • https://natulawud.weebly.com/uploads/1/3/4/3/134309077/8a526f13c92d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381536/normal_5f8f3d4c79402.pdfIn PDF document text
    • https://vonegulozezuxe.weebly.com/uploads/1/3/4/3/134371031/5073620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422136/normal_5fa5c4479fd9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372753/normal_5f8d821e38b4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_5f91ba3e901b1.pdfIn PDF document text
    • https://fegikunula.weebly.com/uploads/1/3/4/4/134482285/7fd55282ce05c35.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tugulix.files.wordpress.com/2020/11/sibasorikefoxonasukitoju.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/keepvid_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/pdf_xchange_editor_watermark.pdfIn PDF document text
    • https://lelijowig.files.wordpress.com/2020/11/asterix_y_los_pictos_gratis.pdfIn PDF document text
    • https://wobevajivujo.files.wordpress.com/2020/11/aggiornamento_autoradio_android_6.0.pdfIn PDF document text
    • https://nezixorasiz.files.wordpress.com/2020/11/99248431840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09774b93-9678-4fde-858a-dd1e36175108/wedusuw.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_off00008319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8319 5660 bytes
SHA-256: cc816271cff380c788a353065fe08e65f3dfed807d13993128588d8a30eca229
font_01_sfnt_off0000967c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x967C 10252 bytes
SHA-256: c4d510d4ac17f13890ec48355d5707bfbb561d52c26f739d2da5780b0d87ecb7

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