Malicious PDF — malware analysis report

Static analysis result for SHA-256 3805cd56685a6984…

MALICIOUS

PDF

44.1 KB Created: 2020-10-14 16:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a2c221458f4b0f979288d3a089da3ffb SHA-1: bcfe9aafe1c703b84b0efd50964a2c0c8768ad3b SHA-256: 3805cd56685a698496e2935354ec990138d965b7e0f0af2bdc64d8de210a4262
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.com/pify?keyword=passacaglia+violin+and+viola+pdf In PDF document text
    • https://site-1038703.mozfiles.com/files/1038703/34012580982.pdfIn PDF document text
    • https://site-1039929.mozfiles.com/files/1039929/2021807033.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/5442098710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f8703908155f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f86ff92cf0e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f8700a4495b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f86f5ffaddeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f86f90e7b908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f870006c519f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f86fe7dee259.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/03448a65-3d60-43ff-9d32-44640fe19ca2/64096520049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f5c43c9-39ee-47df-ad35-2b951df3374a/24165581299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef20989c-b277-4a96-b633-61313b1fe8da/23258233288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb426c02-4f83-4cd0-b4f1-6da198dcf393/mowadodobegotexuxesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1867b6ce-8707-4f96-9230-f7fcfb4b7989/81937013726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6133d41-5227-4b50-ab6c-e3d3783a6fde/puzetipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba77c50-dd01-45aa-9c11-5da903baadc9/56670291065.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_off00004bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BC7 4876 bytes
SHA-256: ef9cca80ca962a12b7ef3cf29b72a2f6bafadfd751601adf2eb9751972ba05d5
font_01_sfnt_off00005c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C62 10384 bytes
SHA-256: dca579086fb7d16fdcc803213d76a49ff677bdad31eb42f856bc6ee257655393
font_02_sfnt_off00007e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E89 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61
font_03_sfnt_off00009353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9353 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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