Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9b76a43f0a034b…

MALICIOUS

PDF

46.9 KB Created: 2020-11-04 14:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 061c0c222f8a698ea3f829ac0bd2f2b7 SHA-1: 115736228912bad493b6ffc9f670ba640b1b6514 SHA-256: cb9b76a43f0a034b4e9320c86982cc0268283d791bcf5333a4936c59562d2267
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://ggtraff.ru/strik?keyword=chf+disease+process+webmd In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_5f943db86f9b2.pdfIn PDF document text
    • https://denasigetul.weebly.com/uploads/1/3/4/3/134332190/8757787.pdfIn PDF document text
    • https://sopowifumerage.weebly.com/uploads/1/3/4/3/134355846/8ad70ff.pdfIn PDF document text
    • https://gimelukisisira.weebly.com/uploads/1/3/4/0/134040832/futamimupufebejiwug.pdfIn PDF document text
    • https://ranefegol.weebly.com/uploads/1/3/4/4/134498511/kupimininoke.pdfIn PDF document text
    • https://ziwugedaxuz.weebly.com/uploads/1/3/4/5/134501511/tumufubojobejinotu.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/faa41e31-454f-4e11-8249-51868b20c83a/40198642658.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/automated_logic_webctrl_v6_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9562ac68-d736-432f-acc5-3c8acabe770c/sasiser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78ca98f-e33d-4573-b01e-b138a90399dc/2397948913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f0b8d5e-7f23-481f-9710-ea59c0345476/sawijel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e661b3-961e-4e89-8002-a63cf14d15c5/tajevupeluzelunu.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/prairie_grove_school_district_calendar.pdfIn PDF document text
    • https://medlineplus.gov/heartfailure.htmlIn 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_off000078b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B7 5500 bytes
SHA-256: 5798b53086d557c09a3f7364bde10277a9fad5f82fddeb15df88ff3870e7717f
font_01_sfnt_off00008b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4E 10504 bytes
SHA-256: 5e32ee02b35ecbb514e3818b50965a1be729ff1a5bc198eebe082142891d9fef

Open this report in the interactive analyzer, or submit your own file for analysis.