Malicious PDF — malware analysis report

Static analysis result for SHA-256 6216620fe1fa7c88…

MALICIOUS

PDF

70.5 KB Created: 2021-02-20 04:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9e346545c12519c43e17fc7d8ac9eea3 SHA-1: 324929497fa2378d9ea3a328527bb8ea1d911db4 SHA-256: 6216620fe1fa7c88cfd1886774499e5b2f3e8c60ccca287231e82ead572b67f1
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=alcohol+boiling+point+trend PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457305/normal_60250f2762748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465941/normal_601be19aead79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484370/normal_5fda889a8ba91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424632/normal_600544193ce5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477137/normal_600e6c2837d2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465131/normal_602f33db46ca1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495684/normal_601fb7fd55717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483867/normal_5fd1936184339.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480148/normal_5fde35b813130.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/mujesogi/aha_guidelines_atrial_septal_defect.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/nokuvibax.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/82988250718.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/future_fight_wbu_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/weather_report_this_week_in_bangalore.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/liberal_vs_conservative_canada_platforms.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/context_clues_worksheet_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/77162395455.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/18765587499.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/management_reporter_ax_2012_user_access.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/baixar_em_iphone.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_off0000d859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD859 5076 bytes
SHA-256: 057d7940a15e6b316951a9e401839202f8da74b304e00d67de2d8296a602802f
font_01_sfnt_off0000e991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 10192 bytes
SHA-256: d8cb65b43b17f778258516e47ff55913a559d55d14b0972d712c20bb28061273

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