Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3bcc1312a6ea592…

MALICIOUS

PDF

41.6 KB Created: 2020-11-07 18:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 560bc75f6a3c46d015c1c98cb85fad8a SHA-1: d45d79197ee82399ec491038c8864e8d562cf3cf SHA-256: b3bcc1312a6ea59276e8fed71f3ef348c5c8e399f8f052d71f4d259ca044e80c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=minecraft+mods+free+dog PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372076/normal_5f8c650f634cb.pdfIn PDF document text
    • https://kojelokawuzu.weebly.com/uploads/1/3/4/3/134341929/6156124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zukodofi.files.wordpress.com/2020/11/bipimugurisus.pdfIn PDF document text
    • https://zogidadovo.files.wordpress.com/2020/11/6483423632.pdfIn PDF document text
    • https://gibupobale.files.wordpress.com/2020/11/48492735951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8063a836-fd8d-446a-8dac-e17a29635e97/9455996006.pdfIn PDF document text
    • https://kawofemat.files.wordpress.com/2020/11/awaken_the_giant_within_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/545ee485-017c-4a29-86cd-cbca30597b3c/dyson_dc33_multi_floor_upright_vacuum_-_bagless_-_hepa.pdfIn PDF document text
    • https://sutajis.files.wordpress.com/2020/11/triangulo_aprobado_teacher_s_editio.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/65548376527.pdfIn PDF document text
    • https://pipijajita.files.wordpress.com/2020/11/yajur_veda_in_kannada.pdfIn PDF document text
    • https://jobebapadi.files.wordpress.com/2020/11/ayyappan_remix_songs_masstamilan.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_off0000661a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661A 5316 bytes
SHA-256: a81a2d2f10f5cf613b961814e738fc3d8f8e436f42e7bf3e9759551b86ed915a
font_01_sfnt_off00007823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7823 9904 bytes
SHA-256: 0ab6d26c6a257ed94950d8e61e2fbacd2a400ec3152cabbd9cffcd6ed03f8faa