Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f513c9cfcc69c7…

MALICIOUS

PDF

42.7 KB Created: 2020-11-07 14:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d296b4d86ced7e525aa4c8e12ec7ab28 SHA-1: 67780a4ea1fff1e759ddbd90c00800a70221ad3f SHA-256: f5f513c9cfcc69c7e95f5b0333cfed54f91cba72f3ae31d2471d56b454fcb7ca
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://traffmen.ru/123?keyword=conceptual+physical+science+answer+key In PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/6945515.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/powaxorisavasar.pdfIn PDF document text
    • https://dinelelulom.weebly.com/uploads/1/3/4/3/134308509/pavigoxo_zavawowolitujux.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/9714766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f871f0dee608.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vavale/the_old_man_and_the_sea_novel_in_urdu.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08538a2c-6baa-4a39-8680-af4ced0d32e8/augmented_ironworks_gear_ffxiv.pdfIn PDF document text
    • https://tuxabavijig.files.wordpress.com/2020/11/37940387668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1372956-d77b-445f-a3d4-417ba970cb9d/64796429716.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_off0000657e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657E 5184 bytes
SHA-256: 23ca8a74610066ca1b3ce6ad7e6a51fd18d5a84dd234ba6746583b589154befa
font_01_sfnt_off0000772b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772B 11520 bytes
SHA-256: 998dbe3a6c0d7ca8fc4aa83bd7bf1362ead7aaf582c4db769f577496725b9354