Malicious PDF — malware analysis report

Static analysis result for SHA-256 071a2235d480f5c0…

MALICIOUS

PDF

52.0 KB Created: 2020-11-08 01:13:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 4103d1876f5a619e8ebd12057a430790 SHA-1: 2c7918562aad394b8390da913246eabc1843ea56 SHA-256: 071a2235d480f5c00e6e90a058df4e82889f2c734de27ece434bd5f513f22266
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=cooking+leveling+guide+wotlk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f87546090882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5f9ce5a486c0a.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/0cbd7f35736ab.pdfIn PDF document text
    • https://foretenam.weebly.com/uploads/1/3/4/7/134700633/wipadete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5f92f23b85180.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/3943123.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.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/vatakefojunib/film_elements_list.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/fodofa.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/15715604055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245570b1-1c62-4a3f-9607-9a4d30dc6e4c/wayne_dyer_books.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/68805875255.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_off00008e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E02 4628 bytes
SHA-256: f8c7623bc77e30d5a34ab3ccb2622ced764ece365353c8086cc404f5e6f307d3
font_01_sfnt_off00009deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DEB 10944 bytes
SHA-256: d3cd72b6d2bef8bc4aba44293d64e8317b0405976547f00c2b471897adf15243