Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6b4c1ded8a3d3a…

MALICIOUS

PDF

46.3 KB Created: 2020-11-06 01:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 7870e416bc62c10d38731075f1acaaf8 SHA-1: ccdbd6a4ad29d26f61b51b5043c36c8a56bf0503 SHA-256: dd6b4c1ded8a3d3ad0a09aa111cf9c97008afb65b5d8d449d39d47d3d5dad5c4
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://traffking.ru/123?keyword=regency+gas+fireplace+insert+manual In PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/1194244.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/satedafadusizo/97753378201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa0e5c9-b45e-4e97-a388-0cd1c60aaddf/vezimirejufin.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/pumofadarijorewe.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/little_mermaid_cast_2020_ursula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab19255-adbc-4ca9-a85d-49a490aaf394/44868055727.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/67814203171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e155c8d4-8cc9-493b-ba26-44b4121a05e3/harry_potter_sheet_music_french_horn.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/17005503650.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/responsive_html_code_table_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/24280951963.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/prximos_partidos_del_real_madrid_en_liga.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_off00007401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7401 5444 bytes
SHA-256: f8ab774f7f226abc1eecf8fcd3f3e1dbdc8fa988ee852e43ce2246c661550d2b
font_01_sfnt_off0000868d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868D 11124 bytes
SHA-256: 4471e2afacd85eb59a63f449409bb8f5fb545d903bb77f4b5fd9a545664470d8

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