Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5c108c12ce348f…

MALICIOUS

PDF

47.1 KB Created: 2020-11-03 12:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c3d615cd2c1ec1744138b794cf764bf0 SHA-1: b0f8e3b9ee3fd8d687804153092ca6d873dc56d6 SHA-256: ec5c108c12ce348f353cc1c8ce77637c6c9a0408775584b17f4de434f10edc64
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/aws?keyword=best+buy+tlc+mobile+app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405202/normal_5f9688fed67ef.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/1/0505/5958/2373/files/convert_to_autocad_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dec22cc-194c-4a85-8618-ae7ab4b3c6fd/a_summer_to_die_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21e768f-d33b-44e1-9502-e1a61b67d10b/lewavojowaduto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb5d589-d2da-4263-ae04-473c3e60a082/13393903731.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/notinupamelit.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/the_pearl_essay_topics.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/73585260411.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/deep_south_speedway_loxley_alabama.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/wugum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e68e53b-37fe-49d5-bb8e-8217ee154f4c/goedkoop_bestelbus_kopen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4101/3415/files/derezogewotutowuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/allyn_and_bacon_guide_to_writing.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_off000077ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CE 5276 bytes
SHA-256: 39e6b4820ca7241cae239d826e51eee58b69bb9b11f36292d6cf35d9602be660
font_01_sfnt_off000089b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B2 11200 bytes
SHA-256: 55906559596342f7bd6efb132397b1134ee2d98810c4a3a9c5d3710cefc4f673