Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8d8b0261ce0c54…

MALICIOUS

PDF

40.3 KB Created: 2020-11-05 17:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 35684aba77960360adc3c80bc0213333 SHA-1: f908181e8fe0153cc320f36921c7a2240c658792 SHA-256: 1c8d8b0261ce0c5463892f01f1922bb1ffc7c5251d8288ecdb3602b8602c6752
134 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffking.ru/aws?keyword=sports+surge+live+stream+boxing In PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/pevizipujalum_foref_wuwaxalusas_kedizaxe.pdfIn PDF document text
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/2421499.pdfIn PDF document text
    • https://kijadixuzot.weebly.com/uploads/1/3/4/5/134585523/nutesuxigim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373985/normal_5f932814af132.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/e5f7e2ed-ad02-4583-a75c-70435c60f356/48940161033.pdfIn PDF document text
    • https://s3.amazonaws.com/watoti/69519573385.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/scatter_plot_seaborn_dataframe.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/astral_projection_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/duruwil.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/special_right_triangles_30_60_90_worksheet_answers.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_off00005d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8E 5512 bytes
SHA-256: c811d667128de7d7fa1c3baaf8f0544de2a2d440ded00998cbfdd261f186b2e1
font_01_sfnt_off00007035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7035 10700 bytes
SHA-256: b25ba11d9783f0921c18faf88513db1041a9afac31c284c02e289c02a563e62b

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