Malicious PDF — malware analysis report

Static analysis result for SHA-256 4054afde9dcb961c…

MALICIOUS

PDF

40.1 KB Created: 2020-10-02 16:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 96bba2501dcfc308f5eb91e29e44c38e SHA-1: 7b06aad41b259bf2420c738d0e1105032ec56588 SHA-256: 4054afde9dcb961c572279516502348fed238a6cdf44d754d223dcb72935ebd9
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://ggtraff.ru/strik?keyword=anton+linear+algebra+11th+edition In PDF document text
    • http://pujasodi.sugarhighllc.com/uploads/1/3/0/9/130969306/vosuki-karofubagu-noxekepeba-jasili.pdfIn PDF document text
    • http://files.januszsupernakwebsite.com/uploads/1/3/1/8/131856392/b331bb.pdfIn PDF document text
    • http://files.papshilltophoney.com/uploads/1/3/0/9/130969204/renifukexefukerutina.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/26350262777.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/subavaxutin.pdfIn PDF document text
    • https://site-1038691.mozfiles.com/files/1038691/92831175844.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8425/9231/files/philosophical_journey_lawhead_6th_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/regiwubekisipizux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/ashley_furniture_dresser_grey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7590/3392/files/black_and_decker_crisp_and_bake_4_slice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4383fd35-af6a-4237-b081-161646047a8b/62598605906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341d0545-1a82-4175-9b45-deaf4cc3115f/xojerowakev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fdc0b87-57a3-4b1c-865a-7d43119fdc4e/famivelunubupikuzegu.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_off000053cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53CC 4880 bytes
SHA-256: e47cc5b82b12a124bf716aeae0368f620172489dd3b5247d11ed3d5feef3aa4f
font_01_sfnt_off00006452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6452 9784 bytes
SHA-256: 3f0ac2a3e13dd923e77cb6323f16549d9c92fe6233b8dd39a2d7cab58862cb28
font_02_sfnt_off000085a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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