Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e257f601c70a262…

MALICIOUS

PDF

71.9 KB Created: 2020-12-26 11:25:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f48a9cbfa5c4f5a026ccc06060281072 SHA-1: da80966069d51db05c02590c3de1e536b6c8b555 SHA-256: 4e257f601c70a2628846a82677563bf9adf44777100533af738dc9d7f0da5d41
156 Risk Score

Malware Insights

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

The file is a PDF that contains numerous external links, many of which are to benign-looking documents, but one prominent link points to 'traffset.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. The document body, though heavily corrupted, contains text related to 'Pokemon x rom download', indicating a lure to a potentially malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?utm_term=pokemon+x+rom+download PDF link annotation
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/duvijodetan.pdfIn PDF document text
    • https://cdn.sqhk.co/koxajavu/vghiiEI/butitumoju.pdfIn PDF document text
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/5dda0fb33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5fbe779e13df8.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/eigieii/ninja_foodi_air_fryer_recipes_chicken.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481852/normal_5fd1288844d7e.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/Nhfvghg/kasafodunegadewef.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://s3.amazonaws.com/guvovigo/resume_illustrator_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/west_side_story_mambo_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/62272411640.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/conference_programme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/etiologia_del_asma.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/words_beginning_with_ln.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/mimexisepofofov.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_off0000cfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBA 4680 bytes
SHA-256: 68b382728db78573d889d68630985df5d4a413d94d58dd2e0e7b93f1db72159a
font_01_sfnt_off0000df83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF83 11856 bytes
SHA-256: c5a39ae75f6e22f59de1be94aaf86f9a4fcdfc1d117f12b47f69f03c377c4758
font_02_sfnt_off000104dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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