Malicious PDF — malware analysis report

Static analysis result for SHA-256 5859c95ff9c18533…

MALICIOUS

PDF

56.7 KB Created: 2020-08-05 06:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 32e2aecddc44cc1a84055044646834a4 SHA-1: b8585d21e1efd48e2dfcf779b8069e3c582d2e2e SHA-256: 5859c95ff9c185330d9cc4f0c12f812cb6b0418ac082d166e41704e3507f9d26
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ttraff.cc/pify?keyword=vitamin+a+deficiency+pdf In PDF document text
    • http://wijolalum.relativekeys.com/uploads/1/3/1/0/131070152/6522806.pdfIn PDF document text
    • http://files.takebackministries.com/uploads/1/3/1/6/131607600/rikolunemu_kitezowekixowuw_mimox.pdfIn PDF document text
    • http://files.loriellaschukrmt.com/uploads/1/3/0/8/130813514/dozabufa.pdfIn PDF document text
    • http://files.authorkimfox.com/uploads/1/3/1/3/131379612/kemunafejebos_furugamoros_vagububike_wivosoruda.pdfIn PDF document text
    • http://files.blakeemory.com/uploads/1/3/1/6/131606984/nimazemokofi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/98312557730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/giwezipotago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/41011919817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/81678282903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/nopiletujaropozej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/chaos_engineering_netflix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/voxav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/xepapupege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/11067760063.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_off0000a094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA094 5060 bytes
SHA-256: 0cdd1250120ae5eff2723be39cfd9ad19ca30bead84dad010fe0813cf8519d15
font_01_sfnt_off0000b1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D3 10516 bytes
SHA-256: d872646af13a0ad671a173bf0ad62fd87afb626b61f8866b0dfbbbfc0a1ed871

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