Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c574cc84e2585f3…

MALICIOUS

PDF

61.0 KB Created: 2021-02-10 04:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 41f7718aacdbfa7e97976e1e85fa7e91 SHA-1: 5ee88129a4de768e0ea005e1a08d65c4bd0f3d56 SHA-256: 6c574cc84e2585f3abe591040d0335d30e68f474e91bec6591e88b310a2e531c
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://bologen.ru/123?utm_term=differentiation+product+and+quotient+rule+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458122/normal_5fc9bba45b3b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_600d896c3ab9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371023/normal_5fc7c792df231.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450340/normal_5ff29ebd2d364.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/d7Ye8SG/fufexunonezewalekizo.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/hb4Whjk/street_racing_syndicate.pdfIn PDF document text
    • http://esclick.pro/bridge_commander_mobileqi13a.pdfIn PDF document text
    • http://bejuzoz.iblogger.org/op_amp_interview_questions_and_answers.pdfIn PDF document text
    • http://summerita.fun/624157426611kf8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_601b6c632615f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499341/normal_5fc7053211924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386089/normal_6015ccf1f1abb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377115/normal_60086cdacdbfa.pdfIn PDF document text
    • https://cdn.sqhk.co/zudoputasafe/fh2jgih/alone_season_7_episode_1_in_memory_of.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fidazel.epizy.com/automatic_transmission_system.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_off0000b1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D9 5524 bytes
SHA-256: c4295acfe328695c01a3a55de35b2761011750a4f90589d6ff0c2fdb447341f4
font_01_sfnt_off0000c4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B3 10052 bytes
SHA-256: 2d04401a55347059928e2b5cc1134fb7915cee5b5bd39eac753fed791d426961