Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ab724375b45247…

MALICIOUS

PDF

67.4 KB Created: 2020-10-07 12:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 73a100e05cb795f851aa1f5811f74c25 SHA-1: 932dbf2cd14f984cb6a6e815011391985d76cf17 SHA-256: 48ab724375b4524769c9cdf4da5683b6c29e8a4696bab9c07db9f424d7d9cf42
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/pify?keyword=honda+cbr250r+2012 In PDF document text
    • http://roberanu.danieljsheehan.com/uploads/1/3/0/7/130738890/8762487.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/1/0481/4890/6145/files/87529464034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3702/4679/files/tadukozemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1379/9064/files/book_of_vile_darkness_5e_conversion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8422/9029/files/chapter_27_the_scramble_for_africa_guided_reading_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f3d6481-6814-4dd7-a20a-5881ea531ee3/24003030946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcbb42ce-4891-4cfb-992c-8569e7721ea4/35380662715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55471ae2-b4d8-485d-84bb-56c83bcca6f2/91311650487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b07062-9a4e-40de-aab2-e7a2b963c65b/52960872653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1749/0591/files/wivobepiparugufebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6078/0443/files/girl_scout_dance_badge_requirements.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_off0000cb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB86 5272 bytes
SHA-256: 8cff256498d352ed152b233a5610dadda95ebb4d7523dd871b48d564f9dc013e
font_01_sfnt_off0000dd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD85 10484 bytes
SHA-256: d3fc1c4a13eaab338f69a5ad9bd6c3562ca376adcbd475786f345b30f7c73bd0