Malicious PDF — malware analysis report

Static analysis result for SHA-256 81dbfdf929f28900…

MALICIOUS

PDF

47.5 KB Created: 2020-10-17 02:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 851a10f170281db27044b8387de1b8fd SHA-1: ed7b6b83cb6f2624b896b6bbdc486de6e348f374 SHA-256: 81dbfdf929f28900517b538222d6b76b16aadf8b11c720e336e7ad89956c5cda
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://cctraff.ru/strik?keyword=mometamax+vs+otomax In PDF document text
    • https://gutugifowofe.weebly.com/uploads/1/3/1/6/131606479/93f2622e25.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/nujaxiseruguwiz_wexofawedupegi_wosazifidapu_pibigev.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/lilosejasafitiz.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/dapolawebufazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5f8a25d055482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f8a0bb79b563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f8a1deea11c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f87160c3d8b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f874a6ea14fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8a14338845c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f8a179677b56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f88f8bfc9bf0.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/2457113.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/1465200.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/104e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0877/7118/files/boston_legal_season_2_episode_26_cast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/88969132304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4878/3009/files/pokemon_battle_revolution_rom_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2076/0734/files/bavejibemujumugajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1497/9490/files/professor_messer_a_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/27233359128.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_off00007ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD8 4836 bytes
SHA-256: fb5fdfa9215ce559a21ed4ab5db1f2f32a8fc8c19cde31478d2644a466305bc0
font_01_sfnt_off00008b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4A 10972 bytes
SHA-256: e46d1ef05e130698e57ad69372059fff0fb119f88f2c3da091a72a787a61b022