Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd980fb93cc652f…

MALICIOUS

PDF

76.2 KB Created: 2020-11-06 21:55:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e5844be0014e74a2772371977c342d79 SHA-1: 13bab89529b478c962c66da044b017101d716cff SHA-256: bfd980fb93cc652f2df08d7d5c30c3ad6a5812a604e509d07f3c35fbc7b79f4e
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=superstar+football+lol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f9d57e9cf7f9.pdfIn PDF document text
    • https://neluposu.weebly.com/uploads/1/3/4/3/134369170/modubuna_xegilabamake_toxevuvif.pdfIn PDF document text
    • https://losepubi.weebly.com/uploads/1/3/4/5/134502138/799290.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dbbd04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414689/normal_5f97a8cc0c9b1.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/ecea2be33.pdfIn PDF document text
    • https://lerexujirizafet.weebly.com/uploads/1/3/4/3/134344290/a2f7e0.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/difogenigewisofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5fa2342f44721.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bowifipimu.files.wordpress.com/2020/11/47377516137.pdfIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.pdfIn PDF document text
    • https://pixetasukero.files.wordpress.com/2020/11/genel_kimya_ders_notlar_petrucci.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC448 5136 bytes
SHA-256: a95d359533f52434a091e49996b34277077cacf3ffc6df863844efe770862430
font_01_sfnt_off0000d5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BF 6192 bytes
SHA-256: c2dc1018c954e68e0026a744b5128482612ad0a6e3d28ff90357f3e05555dbf9
font_02_sfnt_off0000e659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE659 11448 bytes
SHA-256: 6ce74d11b6c3262b683a5f8aae4e720fc2b3374537a589f4ec1c60f1cb1588ee
font_03_sfnt_off00010d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D37 16436 bytes
SHA-256: f68e4b4d42456b360743c7acf69c82a49aa063f25f521dd5c66d8c69e3fa217a

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