Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9769af4c230ace6…

MALICIOUS

PDF

43.2 KB Created: 2020-11-07 21:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: facd1da8825a021736f55bb492f849ac SHA-1: c89ecbe78fdf1fb964f79327069d6c396902cd0a SHA-256: b9769af4c230ace6656201d6f90063a6d569753b6e27e1caa23f80cd0e1f3e95
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://trafffi.ru/123?keyword=girls+pepe+shoes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407788/normal_5f9942bc83d20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5f8a894714604.pdfIn PDF document text
    • https://fapasinexiri.weebly.com/uploads/1/3/4/3/134346339/wepirotafoto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f870af8ba56b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5f8f70db8a5b9.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/6761465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f9015a72eab8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f88a7b0b17b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5f8be64a1c0a1.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/e2010e80-99ba-46a3-a5a5-45b22bed8580/maplestory_dawn_warrior_3rd_job_advancement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/81746968021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d80ac4-b014-4c97-8ab0-a10f8dfcde0b/mabugivakabanaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b2fead-7de0-41e7-9821-ee0e4c05c71a/novodudopuxir.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_off000062ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EF 4328 bytes
SHA-256: d957d82cb769314e19b7f541a498854877925b5e65c8af3939ad8e89c0d6a759
font_01_sfnt_off000071a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A9 9556 bytes
SHA-256: 63710e12f69e3b26f97e2e940e3859eab927d7168254f05211845f9f054a83ee
font_02_sfnt_off00009255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9255 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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