Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9084411c97a44ac…

MALICIOUS

PDF

49.5 KB Created: 2020-11-06 09:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 46c0617863e94ad0caa5abd5b73dac8a SHA-1: 01018b1789bbcbef0e50538d359f8911920ec2d4 SHA-256: d9084411c97a44ac8aad057757a7abbc6967247b13ad86bd6481f995b40fb49d
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://traffking.ru/123?keyword=invisible+man+by+ralph+ellison+pdf In PDF document text
    • https://fadevigobawu.weebly.com/uploads/1/3/4/3/134346767/wetefajadetatidelow.pdfIn PDF document text
    • https://wipamixupes.weebly.com/uploads/1/3/4/4/134460990/c428d1f355d2.pdfIn PDF document text
    • https://detopeda.weebly.com/uploads/1/3/4/3/134305225/duxefasupe.pdfIn PDF document text
    • https://guxafewesev.weebly.com/uploads/1/3/4/5/134595620/senojora_xitikemogezati.pdfIn PDF document text
    • https://saxuvelimeno.weebly.com/uploads/1/3/4/4/134480096/kuxetedoxovuwutoroz.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/5761154.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/domegagowevag/yazaki_cable_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/fogegogonaraserozevuzopub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/zunomuluroxisub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2927/8119/files/74326432819.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/exponent_laws_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/business_management_for_dummies_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7964026-07c2-45ea-a911-e43517f1d7fc/tu_vi_2020_ky_ty.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/funumigutunara.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_off00008320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8320 5520 bytes
SHA-256: 2bebef41de36d936fc4aa0d953590ef687838cc67a9dca495382ccac208d4b29
font_01_sfnt_off000095b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B6 10280 bytes
SHA-256: 37f56f9826a38970364c839b6284fe2a8de6c542e5fab9bba736a6246d10c6c2