Malicious PDF — malware analysis report

Static analysis result for SHA-256 acef7d15758e2186…

MALICIOUS

PDF

54.0 KB Created: 2020-11-06 16:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6f9c38ebcf6995555102e48e91c726e3 SHA-1: e5ce29a34b38bde357dbcf6e792c45ebfb84daa4 SHA-256: acef7d15758e21866bf1f2a9242761105d5b01686f741785ed736f487a6f7b69
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://trafficel.ru/123?keyword=add+a+transparent+image+to+google+slides PDF link annotation
    • https://tuzuvujejoru.weebly.com/uploads/1/3/4/4/134442534/887533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5f8f091c46919.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/f6c1e8299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416802/normal_5f96303757374.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3e232d1a-5200-4e26-88b5-c3b02e667e46/fahrenheit_451_ebook.pdfIn PDF document text
    • https://jivudiwori.files.wordpress.com/2020/11/nobafi.pdfIn PDF document text
    • https://tumitom.files.wordpress.com/2020/11/evaluation_addition_soustraction_cm1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26e5a06-5fad-4518-8cca-d1fe40b73f27/23594592826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b480fae1-1231-44e6-bd88-be4e4a6a8131/vitomuvofized.pdfIn PDF document text
    • https://rotadenig.files.wordpress.com/2020/11/82236523173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cdd59e0-daf4-4bea-a81e-9432de8c2ab5/wubuxina.pdfIn PDF document text
    • https://japegotof.files.wordpress.com/2020/11/menujorakesobugobagatun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5407bef6-7c93-4458-ad4a-b57e58c01205/seal_a_meal_manual_vacuum_sealer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F3 5056 bytes
SHA-256: d0bfe6cbe73a9dfb9dcbb9e2a527a32b100ed7a99603154a72c50b3d01bd4509
font_01_sfnt_off00009904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9904 10500 bytes
SHA-256: 9b3ea481523903b3b32c2d3c1f725b786239a3004bc3dbad6de4a52ec73a9fcf
font_02_sfnt_off0000bcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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