Malicious PDF — malware analysis report

Static analysis result for SHA-256 8450a86c95443cb0…

MALICIOUS

PDF

66.4 KB Created: 2020-10-02 14:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5687f93d9fb19fe4dd69bd4702987aae SHA-1: df3003a8ad191229a363b3ef447e9bf0865a59a7 SHA-256: 8450a86c95443cb0467999323f0cfb5f959bb7c2afbb2afa3a09ae2ff2d58c3f
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=why+did+kes+leave+voyager In PDF document text
    • https://site-1038495.mozfiles.com/files/1038495/74182651593.pdfIn PDF document text
    • https://site-1036734.mozfiles.com/files/1036734/fefijutobutonem.pdfIn PDF document text
    • https://site-1036735.mozfiles.com/files/1036735/jexulukesusomafa.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/68246889110.pdfIn PDF document text
    • https://site-1037019.mozfiles.com/files/1037019/fuwiwerizi.pdfIn PDF document text
    • http://kenofire.yourglobalclassroom.net/uploads/1/3/0/7/130739430/zobijotugajemimes.pdfIn PDF document text
    • https://site-1037886.mozfiles.com/files/1037886/21678414368.pdfIn PDF document text
    • https://site-1039731.mozfiles.com/files/1039731/81458574536.pdfIn PDF document text
    • https://site-1040129.mozfiles.com/files/1040129/fakugirirerixekokuxepe.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/1852096597.pdfIn PDF document text
    • https://site-1037858.mozfiles.com/files/1037858/66238810370.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/fcf3cea1-9042-43a5-92d2-58274176aaa7/60192807055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b32acd1a-c387-465f-81d5-9473c0d6992c/9048053479.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_off0000c7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F5 5328 bytes
SHA-256: ab1b49e75fa06917aad9bce8050971f4f6e0f60518befb2d79b872bc20e77d67
font_01_sfnt_off0000da25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA25 10108 bytes
SHA-256: 5482451f04d985a5ee2c65788ef3a5db5088cd3652dd7349e25afd39d6f1116d