Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb024a2796f02ef0…

MALICIOUS

PDF

44.0 KB Created: 2020-10-12 13:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 268e6ca9ab4b323336a3a6c4c94e5f8e SHA-1: e917cf22196485b1b3cf7f2b9a7264a667037e00 SHA-256: fb024a2796f02ef07c52dbe6e98a0d5abc65c785763460c5f52581030a61a085
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=windows+10+for+android+download In PDF document text
    • https://site-1036697.mozfiles.com/files/1036697/turodubataxijatubepan.pdfIn PDF document text
    • https://site-1039190.mozfiles.com/files/1039190/kurirarugobapelefesame.pdfIn PDF document text
    • http://files.bjaninefulla.com/uploads/1/3/1/4/131438217/320587.pdfIn PDF document text
    • http://files.debbiehayesgallagher.com/uploads/1/3/1/0/131071067/6e671b224.pdfIn PDF document text
    • http://files.merakicircles.com/uploads/1/3/0/7/130738876/panibofe.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/48351211271.pdfIn PDF document text
    • https://site-1048200.mozfiles.com/files/1048200/83721563578.pdfIn PDF document text
    • https://site-1036691.mozfiles.com/files/1036691/gojitawa.pdfIn PDF document text
    • https://site-1037074.mozfiles.com/files/1037074/73917956447.pdfIn PDF document text
    • https://site-1040094.mozfiles.com/files/1040094/nitotudufudafenesabitozi.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://uploads.strikinglycdn.com/files/bb5162cc-3d1f-471d-84b0-1097731b4281/xunopaxugipag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ced8de8-0140-4b77-9772-ed40b989f1f3/nopilowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db69bf6e-e361-492e-a45b-88e9ba7552d4/kabokapuvaxozukelojovuxar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8508fcb9-ed3a-40ff-93b5-009a2afe95f0/12787296495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3bae61e-5452-491e-853f-014f0f61954d/puvojudegojiwasu.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_off0000624b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624B 4788 bytes
SHA-256: ba5ad5acd859f773bb92702725a8284f3e328f19e08cc92e54f5fae477b614c6
font_01_sfnt_off000072a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A4 10020 bytes
SHA-256: 0cd694111b02dc64f562e0a6c7eb2c81be9a756e69ba914c07819e1c0a9b3cde
font_02_sfnt_off000094e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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