Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf097c2f5f20072…

MALICIOUS

PDF

39.8 KB Created: 2020-10-26 09:02:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f7c89ebfbac46169737df4aee805f3f5 SHA-1: 1ff127ddb1aa4e515457fce4c4a0ae1b49401c87 SHA-256: eaf097c2f5f200723dbc0a0f7e5b97e558bc52faa562f5f79301e82b38e08b9d
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://ttraff.me/123?keyword=comparing+objects+worksheet+for+grade+1 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5f945d41637b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f8984e2c7506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f964392b6525.pdfIn PDF document text
    • https://nokifijipuf.weebly.com/uploads/1/3/4/3/134305843/8944807.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/vadewulusiter_jupezitejok_tuzadaru.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/weliso-wugaxolo-bozubadezavoxe.pdfIn PDF document text
    • https://gavawujag.weebly.com/uploads/1/3/4/3/134370084/d30f36e.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/penajomamuw_sakoxulon_fasevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2700/5094/files/aws_certified_solutions_architect_associate_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1181/1739/files/xujimuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7221/7787/files/acute_gi_bleed_management_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a77fe5f-da2c-4515-a3ee-2776f65c12e6/16334200682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529a4b72-d55e-4db1-b8d4-447a181de5f4/3269311793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0ddeb8c-8d25-4327-8d27-da7022b880c5/72729391595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92078baf-bc13-4fbf-8025-5232543c0527/carmen_brannan_lucedale_ms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/088a47c5-557c-417c-93db-7f8ede7867db/walavawetefutatifud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d11b1ea3-7888-43dd-9817-56d557786aed/veniwekakumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a21173-f34d-4d60-9815-e06e1a67b869/fukajigejax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de49783-940a-48ac-95e9-b05978ab7d26/lekebovalali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/666000ac-a544-4530-8e09-52780a37548d/playboy_bunny_images_png.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_off00005a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7E 5868 bytes
SHA-256: 6726e4265dd6130f32868c04f07de63edbc4a43db892e224679c1045f38ee43b
font_01_sfnt_off00006e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E63 10424 bytes
SHA-256: 8f5d3d2f4810bef2c0b645eb67380730d423d0d8dbe85c8a6a21abd20cb4949c

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