Malicious PDF — malware analysis report

Static analysis result for SHA-256 940a490477ec9a96…

MALICIOUS

PDF

40.0 KB Created: 2020-11-08 17:31:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: fe1cac12a3091c0b21e52bf53f022b66 SHA-1: 8de110ef00e9183122c250bb87a6ab96d1378bb7 SHA-256: 940a490477ec9a96b37f7fcb0f1cabb85c951778f60d2bdcf139b2dbcc641d49
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://traffset.ru/123?keyword=proform+725+tl+treadmill+manual PDF link annotation
    • https://tekadepaja.weebly.com/uploads/1/3/4/3/134341299/3162001.pdfIn PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/bawakefepipegiw.pdfIn PDF document text
    • https://zewogamiwivu.weebly.com/uploads/1/3/4/3/134313422/gadiwe.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/8019822.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/e28c5d48f3ca4.pdfIn PDF document text
    • https://bebefezagogu.weebly.com/uploads/1/3/4/3/134372182/bijokebelomagejawaja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rosebuzi.files.wordpress.com/2020/11/libros_de_investigacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82e913b1-5d9b-4670-81e7-85715680efe8/53210425609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f1c57c-df4a-428c-b13d-ed1275aa1daa/shakespeare_mucho_ruido_y_pocas_nueces.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17588d01-7d9e-41d1-8fde-be29157d978a/rosagudek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf24d61-7040-4d81-bbe5-97487ad90a13/80622282443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af5b6ec6-7653-404a-897e-69ae04e6bbc7/informe_final_de_practicas_profesion.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_off00005ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA8 5212 bytes
SHA-256: 4b644767923535d62411a7a6f221166c068f2e5e94257ceac5017c640a1c601c
font_01_sfnt_off00006d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D57 10628 bytes
SHA-256: a5a22899cc1183f39be0c47861ab3b0928ab1ff14baf7d2c73e39f6def7ce58f