Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e45b74a00275a37…

MALICIOUS

PDF

41.5 KB Created: 2020-10-08 19:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f871f68c39f2cd8c059906a0b9c7c276 SHA-1: ffeb820918ed6be5e5fc819a65c421599b0ef1c2 SHA-256: 7e45b74a00275a376b30f11504646ef22e5d2efcb8e62bdcaac3f812c08bbc23
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=ukulele+fretboard+notes+pdf In PDF document text
    • http://fenusopek.mbwc.org/uploads/1/3/2/6/132695569/7187709.pdfIn PDF document text
    • http://files.teach-me-in-autism.com/uploads/1/3/0/8/130813317/8b006fe5def21.pdfIn PDF document text
    • http://duzimav.27andoak.com/uploads/1/3/1/3/131378970/lujefupenulevixa.pdfIn PDF document text
    • http://files.erinaxelrod.com/uploads/1/3/0/8/130874569/de8bfe05806d5.pdfIn PDF document text
    • http://files.welcometothegreenroom.com/uploads/1/3/0/8/130874361/553377.pdfIn PDF document text
    • http://xemirikid.journalistvasquez.com/uploads/1/3/1/4/131483128/2929658.pdfIn PDF document text
    • http://folupe.bayareamuslimtherapists.org/uploads/1/3/1/3/131379163/1096155.pdfIn PDF document text
    • http://tobususos.callaghansofbirdslanding.com/uploads/1/3/0/7/130739893/funuki-duburajarinasa.pdfIn PDF document text
    • https://site-1036852.mozfiles.com/files/1036852/fakajibobulemugador.pdfIn PDF document text
    • https://site-1048476.mozfiles.com/files/1048476/juwoxinibiputovoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/vivofit_3_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9124/2397/files/1992_to_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5139/2409/files/golf_rival_hacks_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4040/7701/files/36317170546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7061/9801/files/delitos_contra_la_familia_definicion.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_off00006526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6526 5228 bytes
SHA-256: 2b38d02e2bd691eb03e9cffa4c48ad26f2a1e7b1c2d0d36be1d131d5175e7e80
font_01_sfnt_off00007700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7700 10016 bytes
SHA-256: 097aca3beeb10b34e3c78acf3a5304ed96e8f8f474cb3c4278360dc47bdc2b6b

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