Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f00e1ea9a52d4b…

MALICIOUS

PDF

41.6 KB Created: 2020-11-09 16:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: bea368425a79a0ddec610380dbce3d05 SHA-1: 7fa3b1df5e336de9acc271ee5d830a0f4e8334a4 SHA-256: 31f00e1ea9a52d4b9755420e52538e78a304b3898e3390801c92d497dc7e18c5
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/123?keyword=dayton+winch+model+3z842a PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5f8be557f11fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388818/normal_5f9c43f98ae78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f8b128357c80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f872fb2c6d44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5f8b284d3fa35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f9498dfb7cbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_5f985cc1168dc.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://s3.amazonaws.com/nonipesikiri/the_story_of_keesh_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/jusil.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/31024728085.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/latihan_soal_aritmatika_sosial_kelas_7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55EE 5512 bytes
SHA-256: 0cea9aa05b6fe886dac4ac90e32934a7cb88b53455dcf70de38d82886bd5a11d
font_01_sfnt_off000068a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A0 10300 bytes
SHA-256: a5ff2027e03f355033a0a7e2290d01a0ef34f07ef49627103db93bae84d37c1b
font_02_sfnt_off00008be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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