Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5acffdb7a4cd069…

MALICIOUS

PDF

46.0 KB Created: 2020-11-09 04:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f1d7a10647f236cedc8dc2862dff30fc SHA-1: 1f0838077640bb7dd8deeb366fa832bdbbdb1627 SHA-256: c5acffdb7a4cd069389428038657e8d73b4baacc0e76e89026a2649858940ae0
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/aws?keyword=watch+spider+man+homecoming+123 In PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/3007040.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/2551800.pdfIn PDF document text
    • https://wumotobu.weebly.com/uploads/1/3/4/3/134370577/rogutoleraxusinizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413368/normal_5f94013e4b9ea.pdfIn PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/ab30440ce20c0.pdfIn PDF document text
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/9922564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f936e9602659.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/wopari/fracciones_mixtas_a_decimales_calculadora.pdfIn PDF document text
    • https://wizugovo.files.wordpress.com/2020/11/24048093958.pdfIn PDF document text
    • https://meniluw.files.wordpress.com/2020/11/72888701979.pdfIn PDF document text
    • https://romekelisefo.files.wordpress.com/2020/11/nitunawikudaremutujozudok.pdfIn PDF document text
    • https://wotibubimif.files.wordpress.com/2020/11/kagavekozunagowapotas.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/burning_calories_worksheet.pdfIn PDF document text
    • https://paseneg.files.wordpress.com/2020/11/imprimer_etiquettes_dossiers_suspend.pdfIn PDF document text
    • https://saxixukosob.files.wordpress.com/2020/11/ikea_kitchen_doors_faktum.pdfIn PDF document text
    • https://lodazogazitu.files.wordpress.com/2020/11/18582996233.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_off00006674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6674 5816 bytes
SHA-256: c6249b0fc8cf3b5d4ceaa227e8f6a89d5999cb52d172924f23c001461717069a
font_01_sfnt_off00007a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1F 2240 bytes
SHA-256: a94fc0b04a3ff4da30cea24b3fb8f2fee2c1ab2008078f8bc2ee051ee710afb4
font_02_sfnt_off00008437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8437 11512 bytes
SHA-256: 1df46bb95aaf40c1db4b0ec4993eaf7ee364ce35a80eda0864abd0707e2b0084

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