Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfafeab4dd45594…

MALICIOUS

PDF

44.8 KB Created: 2020-11-06 03:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 4ff4e1fed6d1f712f1f8bf8542ec9681 SHA-1: 2253bbb366e5fe2aaca22fc5ee4c28fe116e4974 SHA-256: 0bfafeab4dd455946f176700ca6da7174283e5371f7286d5b6e0d1c9f8da7fd6
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://traffking.ru/123?keyword=wingspan+of+a+house+sparrow In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f89f8d215232.pdfIn PDF document text
    • https://gubofeze.weebly.com/uploads/1/3/4/4/134497342/fexirutexewa-nogunarowaduz-fedogul.pdfIn PDF document text
    • https://nugekepujipa.weebly.com/uploads/1/3/4/3/134318644/35bcfc5fa.pdfIn PDF document text
    • https://zilavexeredora.weebly.com/uploads/1/3/0/8/130874610/fefevulakedixizod.pdfIn PDF document text
    • https://vorabatuzawudun.weebly.com/uploads/1/3/4/5/134582038/rapufokesagowev.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/votawigibibuxawukaz.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/parajunisatejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_5f8c8970ec728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_5f8db58be6a11.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/2a86a09a-da58-4eb4-ac50-98ab5aa675c6/2679745219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4038c00-ac6e-4098-8cf0-8421fa18c9d7/goluxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dfe592e-17c8-402b-a388-c75e5b30e3c4/83269990422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039b5968-5759-4538-961e-b3775da2b8fd/30628257831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453f64ee-7039-4808-8ab0-52a17f850a84/nujuj.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_off00006cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC7 5236 bytes
SHA-256: eba54309a4bf573195e46c517a34efec02c77a8a44212e9f24abbdd68921717f
font_01_sfnt_off00007eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB7 12224 bytes
SHA-256: 13c378ef98f695fe1084040e4a4bec058fd44ec896e93429a00f8ba9ea1ac702

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