Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb4aeac83401cd4…

MALICIOUS

PDF

33.3 KB Created: 2020-11-05 09:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1b2e9f9141d2a70ee44c94161be88887 SHA-1: da9595220088fdd45d6f6e453b8c74176cf2903e SHA-256: 5eb4aeac83401cd440d1587617be3d9bb9e987271c382bfab8f1410cbfb8fe7d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a direct link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The embedded URL is likely intended to lure the user to a site that hosts malicious content or phishing forms. No scripts were extracted, but the presence of the malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=please+dont+go+remix In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5f96c596668f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449178/normal_5fa35c38a423b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5fa399872ab4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f8ff7c425d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5f9fdbf2a8f7b.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/5805bbd7-a9b6-4089-9b85-f88bbaf38969/d_d_5e_class_and_background_share_proficiency.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/xakeboxowekepuzusibawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34cfb644-1dba-4863-b2c8-2f80a04c8838/ver_toy_story_4_pelicula_completa_repelis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3ba4f1-6522-4632-b92b-58f5a41c4325/radev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0610cffd-99cc-47e7-9e89-7dfce52c1717/watch_the_avengers_online_fmovies.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/oracion_a_la_santisima_virgen_de_regla.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/textbook_of_ayurveda_volume_2.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/dofobufosuvewezagufirupo.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/15_arduino_uno_breadboard_projects.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_off00004230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4230 5216 bytes
SHA-256: 0467dfce18e790b1f07e1e00b7aed2314c245fa7f3be2f21fbe081c23f8e2414
font_01_sfnt_off000053db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53DB 10960 bytes
SHA-256: 675b6e901671629d54256a43e7a62c7122431aa68f6acae44373baae2279c463

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