Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf5a80f27f36f80e…

MALICIOUS

PDF

50.0 KB Created: 2020-10-13 12:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 7ba67b24d511b1d2f829d1d8633227e3 SHA-1: e3a0c77eab5aa11050414131e6876543c4bc746a SHA-256: cf5a80f27f36f80eeea64017136b448fe8b739b7bf1d6557ae3d0ad97b5c35dd
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://gettraff.ru/strik?keyword=historia+de+la+resonancia+magnetica+nuclear+pdf In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bigunurusipota_vovavubavuw_malolipesafa.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/1d44b872.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/kopiwu_gotatumeturi_bovejixegas_vivikow.pdfIn PDF document text
    • https://site-1037884.mozfiles.com/files/1037884/faderezeke.pdfIn PDF document text
    • https://site-1043374.mozfiles.com/files/1043374/sifurapora.pdfIn PDF document text
    • https://site-1037205.mozfiles.com/files/1037205/1282780182.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/momubunorugug.pdfIn PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/98016884796.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/lanadez.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kekikefuwu.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/34bb0f01-aa7e-4c79-8165-1d5a15c3c40c/23732838508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df187b0-99fd-41ef-a2e3-504fac37fc55/lowonoxusowixilinisomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9406a3d7-2333-49d2-848c-4571136fa60f/fasebisoloxipimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6fbc95d-c990-474f-8585-1a7883ceebf9/pipewovomalomiporesokojob.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_off0000852f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852F 5436 bytes
SHA-256: 18a95b802a508c7c5fc316bb92938aa9e5b48e182e33185bce31e0fbc708b847
font_01_sfnt_off00009792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9792 10156 bytes
SHA-256: 0ee04012fb9362cf98feb5aff55a3c4916af62ef57a18873e11e155525285997

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