Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c338a60b9949b4…

MALICIOUS

PDF

34.0 KB Created: 2020-10-05 05:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: f6acaaf5073b3c880d6e8cc0f47ade22 SHA-1: 8f435b8b10980b6ebd1b126fd6695d74cc0c3683 SHA-256: e6c338a60b9949b44297017c6607e85503a7c210a93e562b12d5e56aa99ee29b
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://cctraff.ru/strik?keyword=icao+annex+18+pdf+download In PDF document text
    • https://site-1043176.mozfiles.com/files/1043176/62033852057.pdfIn PDF document text
    • https://site-1038437.mozfiles.com/files/1038437/panopo.pdfIn PDF document text
    • https://site-1038299.mozfiles.com/files/1038299/27085815487.pdfIn PDF document text
    • https://site-1036829.mozfiles.com/files/1036829/sebetodajipikomubuvopa.pdfIn PDF document text
    • https://site-1036731.mozfiles.com/files/1036731/9845899805.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/44283662060.pdfIn PDF document text
    • https://site-1037088.mozfiles.com/files/1037088/ranuwujaxijetejezogazabo.pdfIn PDF document text
    • https://site-1039641.mozfiles.com/files/1039641/ketibusasuxu.pdfIn PDF document text
    • https://site-1039878.mozfiles.com/files/1039878/23177119428.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/2c18197b-f06a-4bd2-ab97-5b0e7884a285/26537818471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49d7715-1077-4ef9-87d9-45d396718160/gemerigukav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b1854d-6f2d-47c1-802a-5ee135b5df60/43275764322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b35f65-0000-403c-b961-1157574cde32/sudene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58e55ccf-e7f8-485e-87cd-30a5ddc27ae2/xulalavisegivulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249ef677-7f71-4660-ac83-f3e1c0057b4c/pefafuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212fd362-807b-48f4-b58d-94f155a933a2/ginefogibarivikonefopim.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_off00004725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4725 5220 bytes
SHA-256: bff2db990eae087ad1a481bf1d52683f93b6d928121a35cd937b655c61a708ac
font_01_sfnt_off00005924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5924 9980 bytes
SHA-256: 7ff3a5bf518ad8b12b9a91691eee8f7345136469ff0c0f5a1f5d3bbd455c21a5

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