Malicious PDF — malware analysis report

Static analysis result for SHA-256 7854244369f60297…

MALICIOUS

PDF

68.2 KB Created: 2020-09-30 10:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4a5fd5a1d8b89bfcbfc30e61f4fbbf7e SHA-1: baba583768a1358e6a829a96468870091ae9368f SHA-256: 7854244369f602976fd2a9b3ff56b8f8cc8ad8b795a68d791e13ff57865ea1c0
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=bishop+and+knight+checkmate+pdf In PDF document text
    • http://zutifilor.timhamelprofessionalmassage.com/uploads/1/3/1/3/131398560/7110059.pdfIn PDF document text
    • http://files.maddogslair.com/uploads/1/3/1/3/131398134/fc5e4b0e7e.pdfIn PDF document text
    • http://files.inmanhardware.com/uploads/1/3/1/3/131379639/dovizavaxopisumo.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/e3dfebe9-279f-4e80-9b7c-a505d3bb7614/92902902553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85053f13-89b4-477e-b8be-75b37c720a06/87794768305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c99f145-7f60-4c81-b8c1-12450cf09118/figidizuradiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ffe930b-1abb-4b56-805f-e486d3221920/golebedunomeminejol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40bdc61c-b436-452d-92dd-3b64f2f1014a/minakuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86ab4bf-109d-4775-b11a-ffd2a5123c27/69904640931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8166/2613/files/51274130887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/fichas_para_colorear_en_ingles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/darkly_dreaming_dexter.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB795 5556 bytes
SHA-256: f9c366972459c7ee9c135e50d8cbdc64a3c9ac80c7bc5d33f39117173d5d03e8
font_01_sfnt_off0000ca62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA62 10628 bytes
SHA-256: b868a8fae886bb36f5be2479bb013480fb58e1dc6220b3a63beab9053f8bf549
font_02_sfnt_off0000eeb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB2 16068 bytes
SHA-256: 5338b60dac2ddcc9fbf81734882903060897ff8c18563aad6864a581beec55c6

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