Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66b050eb0ba007c…

MALICIOUS

PDF

67.9 KB Created: 2021-02-07 22:59:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9d70e9cadb035917f5086a9651c0454d SHA-1: 490e4ecd87fbcc6205f469e0f3dcbc5110c7b07d SHA-256: f66b050eb0ba007c134e8be24511e0d98e13d65cd0aed1f2461428f82a854b6f
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/wb?keyword=atf%20cleaner%20portable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368487/normal_601a6b47bb84b.pdfIn PDF document text
    • http://dmgameplan.com/zenofuvapamidk62c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416932/normal_5ffda7347df02.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/gJ6ihNY/xoxosigivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_6015e141d502a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_5fe78fe206c2c.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwapusumoge/gihghdw/9763980123.pdfIn PDF document text
    • http://dkblogin-de.com/dudezavitesale8k5pm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417309/normal_5fdacb5b1d342.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/HgfggbC/71176550083.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/satudifin/65745793551.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/mamixoligirilevuvuw.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/39142868852.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/traffic_reports_near_me_now.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/photo_animation_maker_apk_full.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_off0000cd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD13 4960 bytes
SHA-256: bad115f7ba1afb0677fd9df13ca88a352b50b7fb3bcff6c2556f858352748b17
font_01_sfnt_off0000de04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE04 10992 bytes
SHA-256: 58bfe09f519e5b4021408efe80a4dbdf91457fc4b28244b40b85a4ea67355bae