Malicious PDF — malware analysis report

Static analysis result for SHA-256 848473a7537a9649…

MALICIOUS

PDF

41.5 KB Created: 2020-11-09 05:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7839a81e5b22437bb3ff8a83c2cf7655 SHA-1: 6b37920f11e649931d1e4611a80b6c0fe597cd06 SHA-256: 848473a7537a9649aee8109e2ba4cdd87a1b3addf321bdf4d65439275bc05ec5
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=a+list+of+flowers+and+their+meanings PDF link annotation
    • https://jubozofarubowi.weebly.com/uploads/1/3/4/0/134095851/bibamavegaredev_meseniwa_vidozina.pdfIn PDF document text
    • https://jozokuxig.weebly.com/uploads/1/3/2/8/132814463/zojin.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/e27909d0be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_5f9a835c7059b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_5fa8a2505ef90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f967f2373302.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceab7628-1ce8-4888-be22-198afe54c336/majoras_mask_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/black_hawk_middle_school_eagan_mn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95ddab48-b706-4471-ae09-a84fb9c59f59/kodak_easyshare_z8612_is.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/skype_app_free_download_for_pc.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_off0000642c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 5404 bytes
SHA-256: a426e803388e57e463796ad41810d3d716b5fa39d8af12efe90771139a4ee90a
font_01_sfnt_off0000766e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766E 10264 bytes
SHA-256: 592b6ab6bb7ab31a4d7bd684e71484c2a93ee93642e7185638d6034523f35279

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