Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ff154f876df90b…

MALICIOUS

PDF

43.9 KB Created: 2020-10-01 07:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b7e172216b95e59272a7827de46015b3 SHA-1: b12f6177865849863280ec4a122ee6795d77455f SHA-256: c3ff154f876df90b02e0f6a17dcb2eb679542a4ea1712078b38c8fc20bbd0682
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://gettraff.ru/strik?keyword=differentiate+between+bibliography+and+reference+pdf In PDF document text
    • http://files.schroederarch.com/uploads/1/3/0/7/130776249/1b823713566346.pdfIn PDF document text
    • http://pubodevoj.quaternityoga.com/uploads/1/3/2/7/132740405/8a6ed37ae0ed6.pdfIn PDF document text
    • http://files.mwri.co/uploads/1/3/1/3/131398253/c24a68da05b.pdfIn PDF document text
    • http://files.diabetes-epidemic.com/uploads/1/3/1/4/131482991/bijevugobutup-fuganimi.pdfIn PDF document text
    • http://rikagi.concordhsbands.com/uploads/1/3/2/6/132695328/90cec6a32b173a.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/1/0433/9941/3925/files/derupoderumujokakarijuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/similar_triangles_theorem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0853/9299/files/ahora_te_puedes_marchar_super_junior.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/cannes_film_festival_submission_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/estrada_de_santos_roberto_carlos_cif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/32926260584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6251/7909/files/five_senses_in_other_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/46221790122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/croydon_council_tax_exemption_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7547/2279/files/linudabijuxobikikowafed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9434/3834/files/vertical_balance_sheet_format_with_notes.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_off00006d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D21 5572 bytes
SHA-256: 0bc4fdc3430e8a067e7b58014dc6af8baa8f093f433446699736412c69a2a4e6
font_01_sfnt_off00008026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8026 10060 bytes
SHA-256: f18ec7900a808c212a78c775631c4a80486a9982d0b473ef58d5dd3990a52ad7

Open this report in the interactive analyzer, or submit your own file for analysis.