Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efe4d3308c80aa4…

MALICIOUS

PDF

36.5 KB Created: 2020-11-05 23:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: ff6a1a56ab9df8c8c6c51cc2aba49ee8 SHA-1: 85570cf0893c6e11069f26b7361a18cf19f50572 SHA-256: 9efe4d3308c80aa4dd5a681eade7021f92950a7e354cd6dc6bb8a88cc90986b9
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=bd+vacutainer+urine+specimen+collection+kit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423728/normal_5f993dd68510f.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/dcad36586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f98d9f88cb3d.pdfIn PDF document text
    • https://veborejekeraleb.weebly.com/uploads/1/3/4/4/134480613/4a9c9ba.pdfIn PDF document text
    • https://letalisukom.weebly.com/uploads/1/3/4/3/134316231/8620754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_5f94bebc738e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f8aa1e293107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473445/normal_5fa454df0e684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f874922d31d6.pdfIn PDF document text
    • https://zadujemerumid.weebly.com/uploads/1/3/2/6/132695269/66456.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004d1d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004d1d.bin)
    • https://uploads.strikinglycdn.com/files/0444231d-2f75-4237-82eb-cd07ad942040/7868704135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f77203a-2f63-4fb8-a282-0a3c336be2fb/67086825047.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 extracted file (font_00_sfnt_off00004d1d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D1D 5392 bytes
SHA-256: d9c9b389bbbc88733c5f5f1a00be2183f4cbf93875488de51936f8e442339f8a
font_01_sfnt_off00005f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F69 10508 bytes
SHA-256: 04d2dff568b2f1bd7319e2a14d3c7cb26ac4192889590dd7f3a6b100e1ecb761