Malicious PDF — malware analysis report

Static analysis result for SHA-256 8471aae178b1c78a…

MALICIOUS

PDF

37.0 KB Created: 2020-11-05 19:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: f508a8f4060d2e64495215adbd5c602c SHA-1: 5bed915af0d42ce3ea9995ec355053f21292adc6 SHA-256: 8471aae178b1c78a41a4e56ecc78731081c009860361d367d27be42732c30fd9
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/strik?keyword=bunnicula+pdf+free+full+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5f9aafb504b68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459180/normal_5fa235422b0f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_5f8b2da21344e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_5f9c32104b7d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_5f99a875c703b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f8bf540e959f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417306/normal_5f96c1c3af76a.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/2a33f518-e78b-4b2e-80de-4578285f7980/pimorajetenojegujek.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/pdf_of_marketing_management_class_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62131212-8e9b-49f7-b1aa-72a53fadf207/banogiguruzomafironomufe.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/katenezi.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/vimumovunim.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/14745769215.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/seismic_tomography.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_off00005416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5416 5224 bytes
SHA-256: 2f623725b2bd1d9d402b926ff4b7be6c531c27be12f71f18dc6355e242ce2e5e
font_01_sfnt_off000065eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EB 9804 bytes
SHA-256: 134a0632080b29e99f65d59ad6c90f2366d2dbc0e908478bc7334ced2df2a473