Malicious PDF — malware analysis report

Static analysis result for SHA-256 56581c9db2ce5f84…

MALICIOUS

PDF

71.9 KB Created: 2021-02-25 07:28:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ca11c8f09dc4d90abcc4a9638e4d52aa SHA-1: 8639506ad70bf9075109c97debc8c5ddc1f51800 SHA-256: 56581c9db2ce5f84d619bbef7012e71029eb7d7e3b9fb64a13f638e2596e287a
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=what+are+the+symbols+of+electronic+components In PDF document text
    • http://lapitubemexidi.mywebcommunity.org/open_in_paint_online.pdfIn PDF document text
    • http://topsale.pro/546123996499lze0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459188/normal_6031dd32135fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503533/normal_5fd808fd1c31e.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/hiihlnU/kuwipijex.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/timothy_keller_galatians_for_you_video.pdfIn PDF document text
    • http://skidki-day.site/jokedejira429rh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418180/normal_5fd035cf2351c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491669/normal_5fd0dad679fbd.pdfIn PDF document text
    • http://ig-objectionform.com/full_body_stretching_exercises_for_flexibility0p8d8.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/32224628858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471464/normal_5fcbac2a28548.pdfIn PDF document text
    • http://yeswins.space/information_report_structure_stage_1q5483.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/41564405128.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/jixeremipet/android_one_ui_review.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/welajonafokojamanedabawib.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/reported_speech_meaning_and_types.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/bivinagepowosugafumaw.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/ode_to_joy_sheet_music_bassoon.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_off0000dcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD5 5508 bytes
SHA-256: bb4443821060f33f1e716e0f7fa8ab3ae1cdc3cf839a32d310a1f2a8c4e04b2e
font_01_sfnt_off0000ef7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7B 10252 bytes
SHA-256: 4acd5ab71610fd2f47d31c12a6fc3ec1db6891a6b5d028d6c5a707899d55da76

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