Malicious PDF — malware analysis report

Static analysis result for SHA-256 8901186ae8d556a6…

MALICIOUS

PDF

45.2 KB Created: 2020-11-06 03:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 37cd03ae0b221507dff5829d1c9ded81 SHA-1: 46973f2580bf6a2de96a19a607d1c0e3804f80cd SHA-256: 8901186ae8d556a69f0d0fc4ea6636bbb86334bb560046f3e4428852118f4d72
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://trafffi.ru/aws?keyword=feasibility+study+business+example PDF link annotation
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/fbcba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391893/normal_5f922da03e77c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_5f8ba61990ada.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/311785de-9183-4def-9268-e50220420cb5/22526167529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/359dd472-38ec-4281-951c-a8dcea6e3be7/the_giver_audiobook_youtube_chapter_13.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/73896745885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b350c56-e0ad-4ae1-a1ee-f07d5b30400b/buzatijetagolitokatoxub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb260198-e03c-43e3-a547-641fc57b0001/osrs_drakes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/547581329.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/essential_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d56806cb-3ba1-4c95-ab69-206f65b2c5ae/71193348999.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_off00007245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7245 5272 bytes
SHA-256: f1cd094ca2db474b380e1a6b2490ddeedb2afb5975165056092b15efd77b4cfe
font_01_sfnt_off00008430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8430 10528 bytes
SHA-256: 1d077931f2352e03b48e00ca0fae9dcc293e4f886909b30748abd765689e1f57