Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8823e15d043762…

MALICIOUS

PDF

59.3 KB Created: 2020-12-20 19:18:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 8cf0a18a8978e163db71ffdba88a299a SHA-1: af91a683bc7b9bbda0979ef1f89dd3969ba15d82 SHA-256: 4e8823e15d043762b24106b3caeb0cab49b48193f55d27beabed4cda0369264e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/strik?utm_term=enthalpy+calculations+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403271/normal_5fb2d5d90e76e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409246/normal_5fcf1e5fa02d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_5fad81e6548de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425723/normal_5fcbd0f98fe01.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/zafijukopa/78918956620.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/posovodiborimivojujiwama.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/10717057630.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc800ff65a9a5fd4920f89/t/5fdca24986e836421412ea39/1608294986644/90540090803.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/minecraft_1._13_apk_cracked.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde7bb6c954b227390fcd8a/t/5fdf7502a3b92b153c3819ec/1608480002823/14524801688.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/24652025677.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/hellblade_senua_s_sacrifice_ps4_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/39110473670.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/20422519682.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/windows_10_home_student.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_off0000ab78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB78 5236 bytes
SHA-256: 0955eb894cf9ce0599608ab8024199b560086e867eb47fdb3f0350f8b6bc2967
font_01_sfnt_off0000bd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5C 10124 bytes
SHA-256: f9350f1a72c44ea6c56997cda13682a4ea9e78709542993564d57bcaa0e11bd7