Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2bfb6c62621b18…

MALICIOUS

PDF

43.5 KB Created: 2020-11-08 01:22:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8b1d6be8a889886ec4e4c2bfe281b7a9 SHA-1: 6b68b04d393a18a94996967c673ed5808ef9f578 SHA-256: 2a2bfb6c62621b18cf3296420ad9a2fb010b62a09310c5e3e9f2ccb5bcb913bd
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://trafffe.ru/123?keyword=return+man+9 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f8cb0c393673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450509/normal_5f9e662106a08.pdfIn PDF document text
    • https://lidusibujoxoxo.weebly.com/uploads/1/3/4/5/134500869/jemokot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/how_to_get_data_for_encrypted_cache_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/63262082293.pdfIn PDF document text
    • https://razinaru.files.wordpress.com/2020/11/62051774665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e25290-945b-45aa-8bf9-05100cc04411/luxaxabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f3839f-5515-4dcc-860c-46e78d57c821/eu4_client_state.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/setting_quotes_in_death_of_a_salesman.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_off00006d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D73 4784 bytes
SHA-256: 776b660b515cda0532f0d83474a5c8592677d2d268ce3bf0042f897949bde98f
font_01_sfnt_off00007da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA1 10632 bytes
SHA-256: a4d5bd50b737afb11828bee9a8eb5af3dcac875126ee49ae381724626b1ba966

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