Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb634008ec379ef…

MALICIOUS

PDF

50.2 KB Created: 2020-11-09 07:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 375a9e6c33eb7f0aebc7f2cfaa4ad9a6 SHA-1: c3d99b54fafb4cbca53f7d8a0f307cc731869638 SHA-256: 9bb634008ec379ef4cee606cadc838b32362a1fa09fc8d2a54c32fc059f665af
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://traffine.ru/aws?keyword=the+crucible+act+3+questions+and+answers+pdf In PDF document text
    • https://guboriratuji.weebly.com/uploads/1/3/4/2/134235556/05065bde2bf50f4.pdfIn PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/3173209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f9595b3aebae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8a053deb63c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f8bfba91793f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421767/normal_5fa749895cf7e.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://doveniganov.files.wordpress.com/2020/11/google_sketchup_free_download_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb7bae14-4050-4960-a25b-e2b778562b5b/xaremidemivomuwogax.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/wordly_wise_lesson_4_crossword_answers.pdfIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://firijidu.files.wordpress.com/2020/11/23685671370.pdfIn PDF document text
    • https://romekelisefo.files.wordpress.com/2020/11/nitunawikudaremutujozudok.pdfIn PDF document text
    • https://mofisotu.files.wordpress.com/2020/11/najuwetineluxojowib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d64937f9-7b1f-4242-97f2-60f584e0ad1e/12949760578.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_off00007542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7542 5596 bytes
SHA-256: 30682b58000d86de950b63b6c3181e61cb2ce38e6682f51bc99486a21d663c11
font_01_sfnt_off00008842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8842 11000 bytes
SHA-256: 3e0da412c7c113b9b58c9847eaaceda43b375a8c8c9e74b14a58b03406cc0169
font_02_sfnt_off0000adc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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