Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c322d338e77b815…

MALICIOUS

PDF

38.8 KB Created: 2020-11-08 12:17:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 754d9df5d1fd3127fcbf2adc37623721 SHA-1: 05ac39f296de2b7f1fe4d49b7ce8d80322125f2c SHA-256: 9c322d338e77b8154923d4e8872bb5727dfd798c589fad1957191b0bfffa8a94
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://traffking.ru/aws?keyword=mfj-259c+instruction+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5f8b8305a5896.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdfIn PDF document text
    • https://misikeni.weebly.com/uploads/1/3/4/3/134336029/tarafela.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://bifudavoz.files.wordpress.com/2020/11/the_ecological_approach_to_visual_perception.pdfIn PDF document text
    • https://tozuvazado.files.wordpress.com/2020/11/proshow_producer_8_manual.pdfIn PDF document text
    • https://ziselomekubu.files.wordpress.com/2020/11/employment_news_paper_in_tamil_free_download.pdfIn PDF document text
    • https://nofagixonuva.files.wordpress.com/2020/11/21866246827.pdfIn PDF document text
    • https://xexobosekewa.files.wordpress.com/2020/11/convert_to_jpg_reduce_file_size_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/catalytic_converter_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60e6a0f-08b1-42bc-af80-bdfc4fbc3c24/kudajimanesesimuduwimu.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_off00004cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB1 5316 bytes
SHA-256: c2fd57f6708c832509456545c72a29a8674dd3a51f3df3c632f9c29f3d5fd325
font_01_sfnt_off00005eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB2 10076 bytes
SHA-256: 48534e7b99d9ef765a97b48bfa780fe1ad24fcfc56c80057e94bc495b2d30203
font_02_sfnt_off000080d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333