Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3c78b00bdeec05…

MALICIOUS

PDF

51.2 KB Created: 2020-10-26 22:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 080460cfe3cc57a7cd235418190cd875 SHA-1: d6bc7654d170a519ffffa103848879df372afd61 SHA-256: 6e3c78b00bdeec0565c82d597b57a7d10f6efb89632fdc724bb4e6a33d6aaf2a
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to harmful websites. The document body, though heavily obfuscated, contains text that appears to be a lure for a game, likely intended to trick users into clicking the malicious link. The ML classifier also flagged this PDF as malicious with high confidence.

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=potty+racers+unblocked+fun In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5f925472f0b4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f8afddbe6971.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f8dd6a4e9aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_5f9730c4b28e3.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/3f8293a7-0ae3-4ef3-a789-45edfecdb035/foredigupulukamitiluwuful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/414b0200-9cc3-4a87-adf4-4e9bd87eb941/frozen_the_movie_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ff823c-009a-4aa3-94f1-ce84718284c2/dedesebi.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/amebiasis_cutanea.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/55538456779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2195b102-5256-43c4-aa43-df2b2c3fa0e9/musica_de_soda_stereo_exitos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70b7cedf-7752-44cb-b5d2-7c57d767ef22/43373522381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab41975b-a3f5-4b8f-a436-f2932b122c1a/63938736350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032e8f67-164c-4a59-8417-a989afa8cc0b/5693172077.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/arc_back_pain_csp.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/zukaxikiv.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEA 5324 bytes
SHA-256: 44f9a76d4e3a7e2621734dac416bb6547d491f4749c740834453713b44303cf7
font_01_sfnt_off0000810f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810F 13312 bytes
SHA-256: ccb637e2afe521ce7b6277eeaea2652edf400df03a5363e8320bf3f9dc318a98
font_02_sfnt_off0000aa36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA36 16300 bytes
SHA-256: 605b50db2b205e8ef62fbf9e4584144fed5fb274ca5cbc493d03822fa5d5b6b6

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