Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90f91e1c097bd1d…

MALICIOUS

PDF

69.4 KB Created: 2021-02-15 23:31:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8b6046c413cd80b5ee0fea8f7ca0057e SHA-1: 181a4074876cdaee3d45b9eabf539b1588196a42 SHA-256: f90f91e1c097bd1dcb37536bb8a47b7ddc80ae12fe975d2eb39985cc84916213
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://leonvi.ru/wix?keyword=chilton+labor+guide+free+pdf PDF link annotation
    • https://cdn.sqhk.co/bidelefo/GjgijeK/19255824187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_601259ed70282.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480595/normal_5fe2e7b579ea6.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/gh0iINx/532356262.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381544/normal_6007dee930a10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_601316f138640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_600ad971b4922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450883/normal_5fd91f581eeed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_6021cf999f858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377647/normal_5ff3cce734638.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/jghijRT/70855165100.pdfIn PDF document text
    • http://fullhp.info/pre_k_worksheets_matchingnmidt.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/52xjhie/27560038483.pdfIn PDF document text
    • https://cdn.sqhk.co/dijawagag/ifjeuMd/xadogujesikebematigu.pdfIn PDF document text
    • https://cdn.sqhk.co/retobumoki/hadTji6/all_in_one_preschool_curriculum.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/igPoKrK/xapakobefeluwo.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_off0000d45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45E 5172 bytes
SHA-256: cd846f3ae349465a94b27b60ff11423e37a9d76264b3b87c2acf07a46e911ca5
font_01_sfnt_off0000e5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E6 10080 bytes
SHA-256: 464caac8b2b4f54e4b84e262582fddc6e24c99ae2bd3fc97a78773ddcd3f797d