Malicious PDF — malware analysis report

Static analysis result for SHA-256 b148440d27922ee0…

MALICIOUS

PDF

66.5 KB Created: 2020-11-06 18:54:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 3960f7bd5835070efa0ec0b41068cfd5 SHA-1: 6a602a2eb33d5c482377ee5f16a015d6ea160e2c SHA-256: b148440d27922ee04d2ad989e93bff52bc3b018c536961adcb991b477df16f02
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://traffset.ru/aws?keyword=finral+roulacase+voice+actor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5f892942ea1e9.pdfIn PDF document text
    • https://gurivarux.weebly.com/uploads/1/3/4/3/134309953/lagimodewexo-nasug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_5f9be2eea6545.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e177ff-4b3c-4619-aff7-02403465c6cb/japemexagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69365cff-9b65-42f9-b4ee-1d053aecde5f/23176259264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ea1ffd3-175f-4bae-8d8f-b4d87f436bd2/suzirunenemofekem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c10717-3ea8-4587-9dc6-c23a5305cc93/92762116348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeec9c28-2aa2-49d3-a7a9-2ea81c018881/36810695784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17f763d4-7022-4af2-9f9e-7d2da9c3efea/kutowumuvinowulevadokom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79aff680-0665-4b40-88d1-907afc7412e4/serial_driver_genius_15.0.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7892f99e-a9de-4d87-9475-97f7f0332514/58890961693.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF69 7172 bytes
SHA-256: 3d3f986c696c3414c1fd5286a36daaf5378ee2990e99727e256274ea65ce7526
font_01_sfnt_off0000c7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F8 4808 bytes
SHA-256: fcf146dd1133b8b58e922d22aa9602246d9fb5a15a98d910a6a63d3ee1ad308e
font_02_sfnt_off0000d864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD864 10828 bytes
SHA-256: 1829acb5623542071f8c4d28bf0b582d1796ce5509abea7f53bcf0e11edb8d1c

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