Malicious PDF — malware analysis report

Static analysis result for SHA-256 f107b0e3e5bd0cc0…

MALICIOUS

PDF

71.1 KB Created: 2021-02-12 21:34:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8661f0bd5fb5aff7384f5655094f0c02 SHA-1: 7fb3a41170fe4d5a2446693525627a075375ec50 SHA-256: f107b0e3e5bd0cc0635e5756204d73fe14191478c4c65638029234642e25cc29
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=sarah+jayne+blakemore+ucl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477638/normal_601edc19e4ed3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387808/normal_5fe060455058b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490917/normal_5fcd0471a96a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489032/normal_60153b299f32e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412900/normal_5fdae8a68ddfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418583/normal_5feeef9dab0ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_600f39182b4ae.pdfIn PDF document text
    • https://cdn.sqhk.co/xowuzaseku/1jboXnK/doot_skeleton_png.pdfIn PDF document text
    • https://cdn.sqhk.co/zagakobafot/YUyhhg3/gifajulitoluzob.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/6gjwbjb/37208750567.pdfIn PDF document text
    • http://xofenejilomoz.iblogger.org/24054085621.pdfIn PDF document text
    • https://cdn.sqhk.co/dodagirojep/s9heLjd/i_wish_you_love_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zifiroduvibo.rf.gd/malleable_metals_sheet.pdfIn PDF document text
    • http://jekidosokun.epizy.com/boot_animation_maker.pdfIn PDF document text
    • http://wedalavunobuwe.rf.gd/78746797605.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_off0000d874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD874 5348 bytes
SHA-256: 16a4a324828d47f619932b6e157340cb9d78784b38e1b1aac13517d12a00c657
font_01_sfnt_off0000ea8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8D 10892 bytes
SHA-256: 1be94066e92c03b123e6afd608454ae154acaacbff25a1efacde808234014743