Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fa3d3c327f6ec5…

MALICIOUS

PDF

52.0 KB Created: 2020-08-19 12:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 240a2e39893dc138cdfc7725211bd4bf SHA-1: 6c1714457e84725eb9838bd06db90a2db7b98cef SHA-256: 22fa3d3c327f6ec57b88170ad009d0a5f92e0ec565efeb156aee0c07ec21908c
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.cc/pify?keyword=farmacologia+de+los+aines+pdf In PDF document text
    • http://vagazuze.counsellingsupport.co.nz/uploads/1/3/1/3/131379808/bupinipo_loxiwolivofilom_mezitixizagej_dupumofiz.pdfIn PDF document text
    • http://files.keanaturephotography.com/uploads/1/3/2/6/132681294/1919030.pdfIn PDF document text
    • http://files.sookevet.com/uploads/1/3/1/4/131453818/896540.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/1/0432/6054/3138/files/65440607559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/pekerurofomipunodolija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3096/9511/files/77340875578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/marti_c3_b1o_rivas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7074/9856/files/vavixomategab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8177/6795/files/business_environment_book_by_francis_cherunilam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2670/2758/files/intellicast_tewksbury_ma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/22950977518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/93478654732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/99541580041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4738/6264/files/puedo_superarme_bernardo_stamateas_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.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_off00008975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8975 5432 bytes
SHA-256: f75d2d3f549bbe2c557831127a261187af6df53886e92136f555b539ac912402
font_01_sfnt_off00009bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD8 11652 bytes
SHA-256: 7eeae09efadd176667c3beb3125a9de712524e248fc2a9043c00df16bad4773f

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