Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d129e642d1dc831…

MALICIOUS

PDF

40.1 KB Created: 2020-11-08 19:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7f981ff2bc870be7e4f6b85e48d6c300 SHA-1: ba66dedf5411349c3c33d900c40d870fd739ddda SHA-256: 3d129e642d1dc831d6d35f80ce6cc351a6cfae0205227b5c1ae750befb565456
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafftec.ru/aws?keyword=rate+my+teacher+ct PDF link annotation
    • https://nukafezika.weebly.com/uploads/1/3/4/5/134510633/gegokozutuxagaxunos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5fa2e5bb7d250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446497/normal_5fa7326a1f98a.pdfIn PDF document text
    • https://pegelukiratek.weebly.com/uploads/1/3/4/5/134503056/mizojijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_5f8febd5ab865.pdfIn PDF document text
    • https://xigokerurubupa.weebly.com/uploads/1/3/4/3/134312623/f1d8f95b03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415527/normal_5f9a86280608f.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/zoxalomurasemonexe.pdfIn PDF document text
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/aa7ccff3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450044/normal_5fa70b4923433.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jajofexi.files.wordpress.com/2020/11/applied_chemistry_1.pdfIn PDF document text
    • https://rarokazuj.files.wordpress.com/2020/11/50286800228.pdfIn PDF document text
    • https://pifakimep.files.wordpress.com/2020/11/fododuxuxinoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e9aff4-7cc3-468c-b6cd-513a4716a2f6/zorefupomoweb.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_off00005f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4B 4940 bytes
SHA-256: f665c054c5e4b48abe5ebf38b8a17d43ef6a3f648c32a9d74aeb34e5842624de
font_01_sfnt_off00006ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFA 10632 bytes
SHA-256: 2f6dc741290f2b093459af9c1b3702591574d5a9d434818be77e988e9d48c1ad