Malicious PDF — malware analysis report

Static analysis result for SHA-256 98efe4c36399613d…

MALICIOUS

PDF

43.6 KB Created: 2020-10-26 12:48:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7be420d884fd456940ace0df00e25e95 SHA-1: 961e796a8a7bc37c29c613033e796c0d7de3088d SHA-256: 98efe4c36399613dc94b4d347f32c7b49dde59609616dbd75d06ccebc37359d6
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://gettraff.ru/aws?keyword=bsnl+haryana+plan+pdf In PDF document text
    • https://robikonuwobus.weebly.com/uploads/1/3/4/4/134480561/rebij_binorozibikuba_sokupim_baparivuzabup.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/7087038.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/wisuw/australia_partner_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/6534476867.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/77313592097.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/sour_grapes_of_wrath.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3632fa08-aaab-4ea6-b021-1a6f12a3be42/essential_oils_uses_chart_doterra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74830a0-4a3f-4336-a03a-70e8773bcf68/exercice_cod_coi_cos_5eme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944d107c-d094-43a3-a8b9-aeff42388cf3/39307138721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dbb3ad6-e03a-4525-88c8-f13091398370/jagibamudola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/085fcb50-c53a-4522-a30c-8a0e498a9085/25061392437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4573d49a-6302-4b66-a7d4-2e245ebb2b4e/34911151028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b14f589-1d91-4553-9e5b-2470f346571a/masesavakisejewumiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b5bcc8-192c-4396-83d4-a6c205dee917/sizitusakutez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d518757-49d3-4602-a424-7d241a9f74f9/lopefafifimokiman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8257/2463/files/teoria_de_cuerdas_11_dimensiones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4536/7191/files/self_forgiveness_worksheets_for_adults.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4549/4177/files/gusogikowed.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/saturated_vapour_pressure.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/school_things_vocabulary_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/43021036019.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/vegatedowopojisokepakami.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/rifetirirega.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_off000066f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F7 5280 bytes
SHA-256: dff7b44082ab4bf48eae5c9545decad5324e7843eb6929a38ffdc5f84daef277
font_01_sfnt_off000078eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78EB 11328 bytes
SHA-256: d516788b66157593ae630e04f782304f6db8fd7fc00ed443b7ba4f1cd10699c2

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