Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7d296ef1c77a88…

MALICIOUS

PDF

40.0 KB Created: 2020-10-02 20:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 14c7d9862b55e93cf17265a283b272a0 SHA-1: 4024603af43c02272068a855a064b2681a23e4b1 SHA-256: 8c7d296ef1c77a88b2ab33eca059878d13fbd663f74a13c4693d457d7aa2c701
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=back+titration+problems+with+answers+pdf In PDF document text
    • http://dexuxalob.landstaylordesigns.com/uploads/1/3/2/6/132695361/radajotosem.pdfIn PDF document text
    • http://doxiba.kookaburrahotel.com.au/uploads/1/3/1/3/131398345/7823882.pdfIn PDF document text
    • http://files.prescottrealestatereferrals.com/uploads/1/3/0/7/130775897/f3a76c9.pdfIn PDF document text
    • http://wekute.coastalimpressionsstudio.com/uploads/1/3/1/4/131437490/4943917.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/71718f38-5570-4282-b9f5-5971abfeb4b1/birifuwibevidewemanaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859b2ce9-59b2-414f-949d-19baffb95c1f/54262407382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd24445e-64a1-4201-816f-1e6bac10904a/junukupakoriboluzaseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29d7868-57a5-43d5-b622-7ef7a9cb630f/3196584905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0201/9488/files/2102057791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6596/1367/files/canon_of_western_art_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/piwoburezisorez.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_off00005d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D22 5740 bytes
SHA-256: 3de04812c9dfa7d1347ca4b438bca1067f0bb46ac63d7e7250ae93183d788a69
font_01_sfnt_off0000708b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708B 10156 bytes
SHA-256: 51e168449a2d5996ec0f321ff33a47ca0ca5e9ee45ce1d1d732f21d5388bd4f7