Malicious PDF — malware analysis report

Static analysis result for SHA-256 865a7c3119a248d7…

MALICIOUS

PDF

44.7 KB Created: 2020-11-06 11:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: ed4ee9b9ee217b4b430f27e303122412 SHA-1: cf66e12e1780cdbc7dcf129abd130c461b3444a9 SHA-256: 865a7c3119a248d7e1b04aefc989d9a73334dbab1a7f79a7515272140f6969a3
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=abdoulaye+ndiaye+nyu In PDF document text
    • https://jukovuwivoxufab.weebly.com/uploads/1/3/3/9/133997180/radubugimuwege.pdfIn PDF document text
    • https://ligekikisi.weebly.com/uploads/1/3/4/4/134492932/wujin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_5fa489fdae38c.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/vuvimow.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/1690612.pdfIn PDF document text
    • https://xigolomo.weebly.com/uploads/1/3/4/4/134483438/5941271.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/6e789351-2cbf-4c32-b0f2-6f5fc298932c/lijelom.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/5411564603.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/wozojosifisa.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/10555913642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4952/2605/files/jutadezidolosipitepewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2454/7494/files/pozudipaludar.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_off00006345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6345 4576 bytes
SHA-256: f88b692a6744dac5b4629076d6cd75383579998ff24ab94391d715bd7e4b177f
font_01_sfnt_off000072df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DF 10888 bytes
SHA-256: fd76cbaa5324a81e9efa22cb71eb0cd8663cde67fa27bf58c2cdc1015e804342
font_02_sfnt_off000097e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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