Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc9ae41b4c4c4dd…

MALICIOUS

PDF

40.8 KB Created: 2020-11-09 03:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 8e00d25fcad109c56e3d73e38fb45136 SHA-1: a4b777ca51f5404a33f4a3cb472e390497379371 SHA-256: 7dc9ae41b4c4c4dd11a6d669d5fda2f6e0067d65ef7f22e013d0a135dea190a8
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/123?keyword=codes+for+roblox+toytale+rp PDF link annotation
    • https://tazavuzinun.weebly.com/uploads/1/3/4/6/134600399/7404651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f86ffabae90f.pdfIn PDF document text
    • https://xojexibawetu.weebly.com/uploads/1/3/4/3/134361221/wamiba-revuwoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_5f99da00b85f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411935/normal_5f9ffee7926ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f8745ed0e96a.pdfIn PDF document text
    • https://wazijewafaset.weebly.com/uploads/1/3/4/4/134437152/bebegakodow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f8a1e3e83fd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5f8a455caf101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413851/normal_5f970ff1c6303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f9a7ab33fe9e.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/3b659d48-3d71-46d0-8ab6-493714f46f35/48675237113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd6d90d1-e2d8-4511-9b8a-741de2991d0e/batasolo.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_off00006176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6176 5248 bytes
SHA-256: 87a3c82d6d45d6bd01575e42f93f65efb2be6df4a4001fe35750dfe36dd651c1
font_01_sfnt_off00007360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7360 10264 bytes
SHA-256: 21f47267dd1a7951dc3d1a90dff224d04b33b0bf108be9821db42430c8016beb