Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25a78740d38fb49…

MALICIOUS

PDF

49.5 KB Created: 2020-10-24 16:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 0c23ab3c766d10df5dd79c8dda68dc46 SHA-1: 72d10b5d1987a842aa0aa8621628bd86a77d9992 SHA-256: b25a78740d38fb49e9cf17f02edf1cc4c3b208371dad720dae1c75eb38353455
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://ttraff.club/aws?keyword=list+of+assets+liabilities+and+equity+pdf In PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/kagasiwobut.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/tizomagegetisovas.pdfIn PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/tulezekuraves.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/1851611.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/xadipaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_5f912651060c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f8786e0f0c7c.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/wonoti/research_aptitude_questions_with_answers_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/5281/7573/files/69290223263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8189/2508/files/pazovumazixebur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9366/2133/files/neumann_biomechanics_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3042/9352/files/33602292037.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/lumabuxon.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/13785171335.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_off0000806b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806B 5248 bytes
SHA-256: f2b06d3e3228cb882b62d26a37d0727bb6cf2c39feef12aa8228e302828ae5b4
font_01_sfnt_off0000925d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x925D 11588 bytes
SHA-256: eb92bf77b441ac9f9dd8df5410790d27da82c7ebd7098e2b718998413effb3c4