Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ab38b1c4d99627…

MALICIOUS

PDF

69.4 KB Created: 2021-02-24 10:26:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 33d04ae3ab95e7d3cf7bc997a6f2f138 SHA-1: 7a52ccff93c12a71006870ed2477c9130c0eef6c SHA-256: a9ab38b1c4d99627f73694470972e40452c4c27bc4d1d2c8d61f6fc751bfc47f
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/123?utm_term=is+adhd+a+mental+illness+or+developmental+disability PDF link annotation
    • https://cdn.sqhk.co/kepigofunet/cqhdjbk/prestonplayz_videos_in_minecraft.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485711/normal_5fee646a609bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478655/normal_60308a15d763a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5fdbea386302d.pdfIn PDF document text
    • https://cdn.sqhk.co/dugudumopup/khiighd/gamewright_outfoxed_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/tulotunofuz/ygeCig9/22912176924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_601a3dd4eb161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463529/normal_601bcdd199720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_60196bdf5ac22.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/aih3nHB/omni_notes_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_5fd1e198d9431.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/whididw/15568038500.pdfIn PDF document text
    • https://cdn.sqhk.co/xorilulog/ibgf7QO/ruxokiduni.pdfIn PDF document text
    • https://cdn.sqhk.co/ronelejibir/djcjgED/33507995252.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477387/normal_5ffdb9404bf14.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/lbVACha/disney_movies_and_shows_on_hulu.pdfIn PDF document text
    • https://cdn.sqhk.co/gasalikuviz/iDhb9he/29202968826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499656/normal_6026dad00203b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C0 5436 bytes
SHA-256: e47590c1ed26c802bbf1b138ddc1b6d90e229ed25274d1e9cba753c83ee92a7b
font_01_sfnt_off0000e415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE415 10648 bytes
SHA-256: ddc3c8fb9865be6cf75c325c1b6bb4d08a76f1b3cae09e81b74f5c96f8e6a4f2