Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c7f28ff4a7d922…

MALICIOUS

PDF

39.9 KB Created: 2020-11-09 05:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 37cc2709e2625e626d08eb8b2e27a9bb SHA-1: 0b49754ac15605013740c00700c5c157e22920bd SHA-256: c4c7f28ff4a7d92293d3d278562cfbaf5b99b1e9948b0407761133783aa92b2c
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=celestia+luna+between+dark+and+dawn PDF link annotation
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/baputedev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_5fa6fa14c6cb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5fa65e0c454d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f93f36230cbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f8788fbbba85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_5f91ee379dbe9.pdfIn PDF document text
    • https://veraroligesabo.weebly.com/uploads/1/3/4/3/134377370/tiwubatovuxolob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f9e84fce6562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388422/normal_5f90e2f11deb0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zipexazoti.files.wordpress.com/2020/11/mikolatudod.pdfIn PDF document text
    • https://vabavoresadi.files.wordpress.com/2020/11/debewasomogoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc0cba39-c960-4f6b-9ba1-e91f2d19e99b/sowalobexubevewo.pdfIn PDF document text
    • https://fezubukuwone.files.wordpress.com/2020/11/12157212159.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_off00005e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7F 5020 bytes
SHA-256: b5c4c4e47fd3ab9c6be1c74d6f5b8e0ccd4bcfc6d5c1b19783e24cb046256936
font_01_sfnt_off00006faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAA 10340 bytes
SHA-256: 057f694bcf2e91740147b3a30d53efe0e6388a1c2f562be232e0e3e90639d00c