Malicious PDF — malware analysis report

Static analysis result for SHA-256 54397c2a3145e20a…

MALICIOUS

PDF

68.8 KB Created: 2020-09-29 23:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 43d8c7250ba24b169effbdb8fd99fd03 SHA-1: 23c34d6cf18eb695371e96cbede30e599a55a7c2 SHA-256: 54397c2a3145e20a3f0c71be6848a4f23cdb7901b40054f96808adff050085eb
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=aha+guidelines+hypertension+pdf+2017 In PDF document text
    • http://jedod.otahealthmateirving.com/uploads/1/3/0/7/130739919/falogemo.pdfIn PDF document text
    • http://files.thielkearboretum.org/uploads/1/3/2/3/132303395/gasevenudobi.pdfIn PDF document text
    • http://sudemo.newhealthbydesign.com/uploads/1/3/1/3/131379117/a7a20a.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/1/0437/1690/3080/files/bigokobomaren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5959/2864/files/3142216437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/24363294706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/55139265165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/auto_tune_mobile_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/derupoderumujokakarijuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2427/7658/files/luxpro_lp630_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/kirexijasam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/68816088615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/3365/8279/files/77001877708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/ebru_all_v2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/wisconsin_natural_resourses.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_off0000cc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC87 5800 bytes
SHA-256: edb93a3d1dd6b774a43aae1f5173df9a91934496d1bc0b447012440128ea8091
font_01_sfnt_off0000e059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE059 11584 bytes
SHA-256: 023cf290ba992b5bb3b4f5d2e994c7ead00068695bb7c814fb9dfa320511e6b5

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