Malicious PDF — malware analysis report

Static analysis result for SHA-256 92cbf8a88ff5e4d4…

MALICIOUS

PDF

38.2 KB Created: 2020-11-06 21:24:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 7b5ac99acababbb49cbba478880644ce SHA-1: 6c98b2e6eb50dabeddc3ed101e5cdd2e3506c134 SHA-256: 92cbf8a88ff5e4d4bae4bb3517f625c32a621fbff68769dce15c479c88f56b4e
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=five+nights+at+anime+game+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372376/normal_5f96ba1f65f56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_5fa023ce4c41e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385207/normal_5f948e9430a23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_5f9b85487287d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nikuberutozi.files.wordpress.com/2020/11/23255609058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/237aff6c-cef7-4cc5-bfcb-84e3ae694cdb/60298220267.pdfIn PDF document text
    • https://ripigewub.files.wordpress.com/2020/11/vukafunewebilovojut.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/sananga_eye_drops.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d907741-2fd2-4b33-a404-d20bc623a990/27685018223.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/baruxejiwimuzizo.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/58835391358.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/fugafuresotemexanodu.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/dovatopezomep.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_off00005603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5603 5164 bytes
SHA-256: 363fd108e58ddadf59105f851340222e2577b3bbb2873be3e089e4aebd093463
font_01_sfnt_off00006779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6779 11040 bytes
SHA-256: 3cfa0d43b9503e109f15ec314a99ad5191866c28cc1cd83948e1d8bda7a57cab