Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd665353e9d42e9…

MALICIOUS

PDF

40.8 KB Created: 2020-10-02 14:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 5a2bf3cc1dfc62b144e3a2316238c541 SHA-1: 599cc9e750eebe47e96f2e3797ae8369aad8537e SHA-256: dbd665353e9d42e92d95749e069a6e8fd617a06c30adbcb7e35ef117858f6a63
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/strik?keyword=umbrella+academy+parents+guide+episode+1 In PDF document text
    • http://dodatu.bengalcatscalifornia.com/uploads/1/3/1/3/131380344/lozovogi.pdfIn PDF document text
    • http://files.v-on-shenton.com/uploads/1/3/0/8/130874361/xikeretozejezubixod.pdfIn PDF document text
    • http://files.delormehumidors.com/uploads/1/3/1/3/131380550/b3f932296e556b.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/1/0481/8085/4951/files/applied_predictive_modeling_kuhn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0070/8765/files/wufojudene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6633/8711/files/instrumentos_de_investigacion_cualitativa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/xevodurisuxafege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3836/2786/files/odes_of_solomon_38.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0d88887-fe9b-4dd8-9edc-59c7cf452040/vanumofakabado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd5a2ff4-0db8-47c3-9531-8dbc4cc32b6d/75789341268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4641a069-5850-4add-b309-6470129114fd/gitijowumenasovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1428476-2535-41ef-a8c7-d549b737379d/kafus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b868ee33-a26d-40f7-aab9-8aa9cc103e04/vetuvimatozutifovepilole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0854e87b-1151-44c8-9418-d0d8c9209752/18789536764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75298bc5-3b1f-4117-a608-436a2929a124/ruxoxipenup.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B1 5680 bytes
SHA-256: 51f89cd5d00e0e80515a8d5159d16e428ec387c0a75e86c2a3afb500d5c14616
font_01_sfnt_off000073ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EA 10052 bytes
SHA-256: 8b0481898b0b83655696459f50c00a65c8aa58c6cbc48be7a36e89ee925dd9d1

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