Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1126499b796324…

MALICIOUS

PDF

39.5 KB Created: 2020-10-03 23:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4137513926fb03d532284431e32b470b SHA-1: e3f0a939a2e74ccdb3c5266b68299a540cfe93a7 SHA-256: 7d1126499b796324e6c4426bef92ce836b078bcb4f74d19ac8f1fc6c1066d84d
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/strik?keyword=initiates+of+the+flame+pdf In PDF document text
    • https://site-1039409.mozfiles.com/files/1039409/35653732012.pdfIn PDF document text
    • http://jutef.euroforestireland.ie/uploads/1/3/0/7/130775363/6f4d61ab37f9.pdfIn PDF document text
    • http://files.cinnamonsbotanicals.com/uploads/1/3/0/7/130739833/908973.pdfIn PDF document text
    • http://xemeb.shondakirkministries.com/uploads/1/3/1/6/131637254/cecc9561669.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a718cbe-f3b0-4488-b5a0-11855cee4695/1060174184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb652b4-f005-4db1-bc82-20cc7dd3560a/54542471805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af970cb-a503-4575-bbb1-d668ce0a654d/vowitegovizojitap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e5a81c2-f76f-4a41-adbe-1c08dfe097e0/jevuvurozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1362be-cd0d-4bd9-87a9-9351e771333e/zijojosonarogofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a225772-3ad3-4c81-9dbf-a715a8ea474d/natomipop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29051c7b-3ed1-430f-9501-688c899db782/31386628742.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_off00005d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D43 5124 bytes
SHA-256: 4d5a0d200b695fd866a2860eec2a16f6e3bc2f7c5293af34c28ec9fa93d89c76
font_01_sfnt_off00006e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8E 10364 bytes
SHA-256: 3fcb3da80978e8df6c919d22fd46e9c0a089d20a82427a814695089216350629

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