Malicious PDF — malware analysis report

Static analysis result for SHA-256 85aab4ec6d66e21b…

MALICIOUS

PDF

61.6 KB Created: 2020-10-30 07:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: e14fafc1047cb0b3e18aefad70dd9eba SHA-1: 42464de990819f580909db9437968e95d318ea49 SHA-256: 85aab4ec6d66e21bea0b4773355442c7146e5b15281bf8d6c9ea4617e5831727
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=oracle+receivables+implementation+guide+release+12.1 In PDF document text
    • https://galebekamabe.weebly.com/uploads/1/3/4/3/134305591/7618918.pdfIn PDF document text
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/zusoluwifivelefasefo.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/8615e86.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/78c2acb3c6b73f6.pdfIn PDF document text
    • https://kunizemofowirux.weebly.com/uploads/1/3/4/3/134311671/4f3f8501054.pdfIn PDF document text
    • https://ligexomapaku.weebly.com/uploads/1/3/4/3/134321337/7655382.pdfIn PDF document text
    • https://judemozosuduj.weebly.com/uploads/1/3/4/3/134306717/laronabegodaf.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/6367849.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/gemam.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/xefoxosusediv.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/3325135.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/4f1956c2-989b-439a-9cfe-605dd2e24377/sqoop_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0f83d8-ed5b-4f73-870e-d02cacdf7488/trimet_trip_planner_bus_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddea8fef-c7b6-46b4-8807-ff76c205797e/vaziredozosuwudimud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0170a89e-6e1f-45ed-92e8-ffdb8efafc42/80933146318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7608eef2-5e18-447b-adc5-4b31ee0dd36f/tetan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/168da023-9ef4-4548-b792-d57d3605b62b/xudofejivotaroka.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_off0000b2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B4 5836 bytes
SHA-256: 96ab6fa8c2b2638203f4233600df7a6246db7a77fb76f5a4ac60e4afed2fb237
font_01_sfnt_off0000c679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC679 10100 bytes
SHA-256: b3167195584f78b078db3d76f2d558aaa0881f83571bb78cad9d62a92e9af82b

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