Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef2e195bb0040c3…

MALICIOUS

PDF

52.1 KB Created: 2020-11-08 09:35:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e212aa4d3801a2e98c5971884c7f822d SHA-1: c109fe9f57e02804590d376bfb76e3debed185d6 SHA-256: 5ef2e195bb0040c38e528b7dc88a1e3b3ce3d4d5fbff3965f4c0474f20b200dc
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=goldsmith+ff14+quests In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f99f45b2794f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rifoloponeru.files.wordpress.com/2020/11/18071894850.pdfIn PDF document text
    • https://pejijonarek.files.wordpress.com/2020/11/cardinal_and_ordinal_numbers_exercise.pdfIn PDF document text
    • https://kutesalo.files.wordpress.com/2020/11/88664019125.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/orc_assault_simple.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/cse_20_ucsd.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/zijitudusememujadi.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/undertale_megalovania_download_mp3.pdfIn PDF document text
    • https://danuxowifoka.files.wordpress.com/2020/11/94260233925.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/merchant_of_venice_sparknotes_act_4_scene_1.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/93971077018.pdfIn PDF document text
    • https://zizogugegune.files.wordpress.com/2020/11/pokemon_breeding_calculator.pdfIn PDF document text
    • https://gezovuxa.files.wordpress.com/2020/11/11269336385.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_off00008d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D76 5136 bytes
SHA-256: 47ee8c2b681802eb26d8b8a2f68504d0dbe2d1a13fc6262ddd5ce8f1841b07a4
font_01_sfnt_off00009ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED5 11040 bytes
SHA-256: ae3134082e8eedb0926dc5f188418515ed3083a123aa228d97c73085b313f0f0