Malicious PDF — malware analysis report

Static analysis result for SHA-256 d91f9e7048c73255…

MALICIOUS

PDF

53.5 KB Created: 2020-11-09 07:56:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b7a7c41b465c61dcadbdd956d163a50b SHA-1: d5d86ef0609fbca2f3600a99b1f4b37f0fe5c423 SHA-256: d91f9e7048c73255928f44df3d24f170152156798658bbd74b5682e93628e156
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=burrows+wheeler+transform PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5f9272cad83c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425010/normal_5f9e08d5b8baf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402963/normal_5f93c32e9b136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5f97c9f88ad1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5f8e815768ef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_5f8e08f19c3bc.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/373a85f3-5c4c-4fb3-b30c-ade7a15afa06/koreleposawuzonoxat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52278f1b-4aa4-4585-a904-07f8bfa52096/92628100564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2758c7-15d3-428c-a62c-51ad8876bc7d/vetogetexamog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3da4c3-66e7-4f39-aa54-3b439c48edd7/love_nikki_reconstruction_suits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f569cca4-b129-434a-8a24-c7b1e9bf8a40/rotadadizikusasaxoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7ce9aa-4a43-49bc-9dbc-93cad8be2600/10538525389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f462e5-a061-4d9b-90b2-c2e9c870ade2/79476559713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a96e74e-f681-4bc4-99a2-50e0434b0b29/sebubabanelekudagelopos.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_off0000819e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819E 4984 bytes
SHA-256: 2a1de7601c9111f334609988fd1bc393c78f4dfb1bb56633a167f6240a8d53c9
font_01_sfnt_off00009277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9277 12248 bytes
SHA-256: dd49cd59c6a7bc3b92d2d80b2c017b43f1cc9b169b3403bb458bf0fdff37d35e
font_02_sfnt_off0000bae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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