Malicious PDF — malware analysis report

Static analysis result for SHA-256 923750e5bd53fc7f…

MALICIOUS

PDF

42.5 KB Created: 2020-10-25 23:57:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 0b1e3ac173154e42ab7b41cb6c0b1889 SHA-1: 7a38108489523ddadbe562dbf9ff8668c5f4097d SHA-256: 923750e5bd53fc7f36b70e1755ac55da95bf69a556cedcfb22cb0bb677d8807a
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://ttraff.link/123?keyword=flash+manual+advan+s5e In PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/2208935.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/lagumisebemaja.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/winugerotelafetojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f8809ca4fc1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5f8ef91b113e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f93793923e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393638/normal_5f8f5b373583b.pdfIn PDF document text
    • https://dexixafavako.weebly.com/uploads/1/3/4/3/134348567/2481320.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/592a9ee0c4e6e.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/fulotiv-tegudilo-dotuvev.pdfIn PDF document text
    • https://sakifawabepufa.weebly.com/uploads/1/3/4/4/134466371/vojige.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/4469595.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/nibutigazi.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/descargar_mapa_bilbao.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/36704714978.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/caballo_de_troya_saga_completa_descargar_gratis_mega.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/zijaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eadcfe4-897b-4d5e-a66a-25a418eb0f2a/lonufavozet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/813ae0ec-701c-4055-8e9d-3e459bd6926c/xeladepupoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee60d3d3-4d8b-46d5-a351-cb2faf683700/93693831014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f27611-1617-4c23-8013-134bb3b3c543/nike_joggers_size_guide_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c89175-0c10-481b-be8f-a27752792cfe/32172379101.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_off000066c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C8 5108 bytes
SHA-256: 1ded730afed86b37c405effc0a82d506b84b0ed003e40325489ae66cdc0bcc8d
font_01_sfnt_off0000780e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780E 10864 bytes
SHA-256: cafefb54b5f98644921bce3d9ebd4f574cde14b2c645d8a2a75bed9456e4f14b

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