Malicious PDF — malware analysis report

Static analysis result for SHA-256 de980d48c1b08202…

MALICIOUS

PDF

41.6 KB Created: 2020-10-16 11:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 098ca0f77affb8ad7ee7c6084f4efde2 SHA-1: eb9431d087c249d860e033ee8de446cf7cb6720f SHA-256: de980d48c1b08202ae3cc5b425571a786c20fa9dd545bbd538f2a310a288c57a
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/123?keyword=measuring+mass+worksheets+for+grade+2 In PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/8b2901d9.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/fafusimadila_bewekuseb_zotudefubitos.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/rerip_pegijakex_tajojij_farivorepaki.pdfIn PDF document text
    • https://lejigatoni.weebly.com/uploads/1/3/1/8/131871980/lenasoritevegijalaf.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/mezurusetubedejiwo.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/7041606.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/3f3ce0c2bb7.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/9fd55072845169.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/mukag.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/84deb81.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/likal-damaxawi-kakoguxuratisiv-dobutivigila.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dbbd04.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zidebesirolabavo.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/1/0439/9779/0366/files/50337703761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/7763/0873/files/cml_handbook_scotland_architects_certificate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6286/0197/files/37429658309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6851/5012/files/duke_nukem_3d_megaton_edition_trophy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6128/0413/files/20924906559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/50485863694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6340/0861/files/jixopipajukedotafe.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_off0000639c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639C 5580 bytes
SHA-256: e7c1ba23b6ffc3c268a2fb57832ad24ed9b02e054071397ffe9a1a71ad0ade2c
font_01_sfnt_off0000768d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x768D 10088 bytes
SHA-256: 0d0f499738ce4d3d656ddd3877b0ab9174444417865825a27f129b2d2ed738f3

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