Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf59f816254906f…

MALICIOUS

PDF

73.1 KB Created: 2021-02-15 13:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 713f48dfe3358b8a2af49e5530b571fc SHA-1: 5c683e80ce23931d698412c1f623c570763a52d9 SHA-256: 9bf59f816254906fc9c4ee4d5852537cd388596687aa80102a2084b1c37181f2
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://maypoin.ru/wix?keyword=printable+apostles+creed+worksheet PDF link annotation
    • https://gujukajiw.weebly.com/uploads/1/3/1/4/131437807/18ddd50a4f431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_60200ab2b4f8d.pdfIn PDF document text
    • https://cdn.sqhk.co/bobavijiwoba/rhihdgc/xosapovu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5fe3576f68541.pdfIn PDF document text
    • https://cdn.sqhk.co/tapowifilez/bP4jinr/63698330925.pdfIn PDF document text
    • https://xemelavu.weebly.com/uploads/1/3/1/4/131437726/zesozeju_bekipoxabesipij_jaranupu_masufumawe.pdfIn PDF document text
    • https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/704a31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369916/normal_5fecee9fa39e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_5fcf7d65a72c0.pdfIn PDF document text
    • https://cdn.sqhk.co/foletesubuf/bhhlMhh/sibosigubajozatotonipumu.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/agghbFb/7561748439.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/iRjbkSh/juwew.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/jenisozazewubo/84818861766.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/spoken_english_course_material_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/xekerel.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_off0000e23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 5456 bytes
SHA-256: f209f39aec6839efa5a84554c8e531445d1245819a14ed80a29cc6980b089520
font_01_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 10236 bytes
SHA-256: ff480b4698d496b65b0ad82154c59376b91706dfcb43f7e04afdc2657a0741d9