Malicious PDF — malware analysis report

Static analysis result for SHA-256 c919936c3bf30c45…

MALICIOUS

PDF

39.9 KB Created: 2020-11-08 22:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 50926c02c91c29e993e5cb0f795c7565 SHA-1: 8c322a36e537c945be50bfccf4de118a3fc11726 SHA-256: c919936c3bf30c45f27de06657aa3238509e73aef39231469f485057f0e5b5e4
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/aws?keyword=flute+wooden+headjoints PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392649/normal_5f8e212d47eb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386092/normal_5f9341ed2461f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381534/normal_5f8ea8d7f307e.pdfIn PDF document text
    • https://netopanuneju.weebly.com/uploads/1/3/4/4/134493403/9242598.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/widuxade/48812179031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15f48702-d819-4f6a-8980-406852f5cd86/japixibunaxokuzowiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb446b6-d531-41f1-9972-4935cd2ca755/37226978417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a179cf-3c0d-47a7-8e0d-326cfa98ac06/xufuwir.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/samsung_remote_bn59_01223a_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/nesutebopunoxowawuseza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae315e0-b4c0-4080-acfb-d861895c9973/jifukubesimobaxonifib.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/17736760055.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_off00005d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D71 4940 bytes
SHA-256: 3ed4d8786601d4002e250061a6b39907871977aa448457f1a7b6ac3797ede2f0
font_01_sfnt_off00006e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4E 10908 bytes
SHA-256: 0850b54739a9f7b11b7365b9ae46c773be0c211ab534f40d2b76f81373aeea7d