Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1ae6f03e922913…

MALICIOUS

PDF

63.8 KB Created: 2020-10-30 03:13:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 4f8b34bf7cdb4b9bc1df28947b15c6be SHA-1: a3d90e93fc854e1698d597b938bbed76e11f7d0c SHA-256: 8f1ae6f03e92291388f78ce2c735ef073757e327bc8125d2cb090e1fae3e09b6
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ggtraff.ru/aws?keyword=teela+he-man+movie In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f9338939a7f7.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/paxivogedewilu/destin_florida_wind_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86bc1b76-e400-4fa7-a4e6-c2f1cda6f4aa/nosumaziza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d12ac9-1b81-4909-8f18-b71d35bb0059/super_mario_3d_world_rom_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/79464029928.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/daxobeled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/764c3872-79af-4252-a972-cf94afe2d9b7/wekerokejixapitexobosixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f606fbe-555a-4c3f-bfcd-0609403d20f7/30645654008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b5e20f9-124d-43db-815d-7ccb2c212001/6228796740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b543f4-250a-4b40-913c-bd55dd29e9be/triangle_congruence_by_sss_and_sas_practice_4-2.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF0 4692 bytes
SHA-256: 4eb23a3a9d9f47547f52d90a99657ff59472975c31d8c9cef4316566952c10cc
font_01_sfnt_off0000aac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC3 2660 bytes
SHA-256: 3576dd373b651515f47e23d31ed66261cdf4600bff3365b97b89943213537ffa
font_02_sfnt_off0000b62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB62E 11096 bytes
SHA-256: f198a94066a733de0b02437323e38389ab7dbe64fc0265478942136028798d2f
font_03_sfnt_off0000dc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC56 16208 bytes
SHA-256: 22340404e99e8060bf632b33ddede5446834c1ebbe7d51db3938fad71ca9e190

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