Malicious PDF — malware analysis report

Static analysis result for SHA-256 188a14201a09c850…

MALICIOUS

PDF

45.2 KB Created: 2020-10-07 20:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0750ff408b5ad0fbc87dcf224bbb17ca SHA-1: e94f82d79a3ec697783045d384304e14cd3e0321 SHA-256: 188a14201a09c85005837c762415b0e0fd9a57c9c485ba2b80172cf11caa088a
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://cctraff.ru/strik?keyword=sappho+ode+to+aphrodite In PDF document text
    • http://files.casapaloma2.com/uploads/1/3/1/8/131856415/danutid.pdfIn PDF document text
    • http://buliwenaw.heroinetheplay.com/uploads/1/3/1/4/131482975/857590.pdfIn PDF document text
    • http://files.holliekunesh.com/uploads/1/3/0/8/130814605/5669162.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/b20dba89-f7ca-4f12-8f3a-dce7fb6ba689/10664421187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b49935-b876-4e75-b577-e8f32995a06b/godeladonoxaxidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7a956c-7789-46b8-a700-c30631715d86/wisekegabowesev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffbf51e5-7146-46c8-889a-a7070f084c70/69627091780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7dec4b7-0772-4118-b4bd-e8696c80d4ca/guguvigag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2939/1516/files/34718545387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3698/4732/files/guitar_boogie_tab_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/961ea22b-aef4-45dc-a115-f401dff9fded/natimaxefijiredojebipeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07aa74ee-c961-4f0c-ab4f-88abd748ced1/68112481029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21585c20-be2a-4ba1-8ba7-fdbd05376388/vovabamovuzevado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02517043-825d-4841-9742-02ea83505732/sopozimeputewuvitiru.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_off00006c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C41 4940 bytes
SHA-256: ebad006b384b4efdd461afec004956ce0a9f8de170705f095ed316722218f3d2
font_01_sfnt_off00007d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D01 13152 bytes
SHA-256: 6f42ff5f0e9e37ad7a2b2067451395019fc03137feace5499791bf40bf9c3ab5

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