Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeee0c6f3316516a…

MALICIOUS

PDF

52.5 KB Created: 2020-09-30 00:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3a2995799d512c33964889c43e26d190 SHA-1: d30d48a6dfeda285b57cb8a5b48aac988f1109f8 SHA-256: eeee0c6f3316516a261a4ff6946c74f9f1d47c95200b3a0040f668bd4b61073b
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=nematodes+mcq+pdf In PDF document text
    • http://togewiza.susannaabeldesign.com/uploads/1/3/1/4/131438233/9057895.pdfIn PDF document text
    • http://files.sarasotarecleague.com/uploads/1/3/0/8/130814100/239dd2f041c194.pdfIn PDF document text
    • http://files.annakenna.com/uploads/1/3/0/8/130814124/futudipapi.pdfIn PDF document text
    • http://gowamof.restorativejuveniledetention.org/uploads/1/3/0/7/130738623/0094a21f5482.pdfIn PDF document text
    • https://site-1036935.mozfiles.com/files/1036935/tezod.pdfIn PDF document text
    • https://site-1037218.mozfiles.com/files/1037218/kibulifovariledidabufakub.pdfIn PDF document text
    • https://site-1036852.mozfiles.com/files/1036852/27225032704.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/fesudumebuder.pdfIn PDF document text
    • https://site-1036867.mozfiles.com/files/1036867/sasizewet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2c2a0d-1dcc-4b69-8ee3-ca36672e9e39/78893249012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00a122d-3c89-43e1-8e9d-c019cebbc6b4/22789615665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a67191-7204-44d0-9222-e74572f57d02/26595240322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d864b1b8-d193-4f43-adfa-dfacd3e567fb/wosekudaz.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD0 5268 bytes
SHA-256: 559ad5dd59f4e8a8cc29b698a835dbc825a026fdfa2006468b6dfe1aa0874a06
font_01_sfnt_off00007cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB3 11780 bytes
SHA-256: 87e78e1b44d15c9cfa5aca9a3347cdb05e8c3b3d42d1654a8081dae4eba7ce00
font_02_sfnt_off0000a11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA11A 10484 bytes
SHA-256: a35608de9247bb29accc16e1667e836835e81ccdd4c7925843fff2a7aeb04a65

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