Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0cbcfe7e8935101…

MALICIOUS

PDF

66.0 KB Created: 2021-02-12 16:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a760628e072b7b9822408109a5b62351 SHA-1: 2e19a31a80b8cc305fdffd98ebac4375d6c26788 SHA-256: b0cbcfe7e8935101d14a3f0e2d54a2f7a614af077a765e780583d26fa7f17396
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=intro+to+business+chapter+7+test+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476148/normal_5fd3071974812.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460946/normal_5ff084e88e6f7.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/hVZjfbu/riders_republic_gameplay_ps5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481418/normal_5fdc54e287401.pdfIn PDF document text
    • http://jobauthor.online/42761392548h0ow0.pdfIn PDF document text
    • http://verifedform.com/rufedazulitinatapevirokiprw6se.pdfIn PDF document text
    • https://fiwerabonu.weebly.com/uploads/1/3/4/3/134347662/sesikewapekanukefiwe.pdfIn PDF document text
    • https://nepazumikad.weebly.com/uploads/1/3/5/9/135958915/kobejalupifogixixap.pdfIn PDF document text
    • http://batmbatm.ru/saxon_math_course_two1uh7o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457862/normal_601cfde41172f.pdfIn PDF document text
    • http://roflan.site/free_games_download_for_pc_windows_8idj2c.pdfIn PDF document text
    • http://fredo.bike/ssc_cgl_chemistry_questionsvwlvu.pdfIn PDF document text
    • http://tiktokhd.design/4673iyt.pdfIn PDF document text
    • http://teagreen.space/dragonvale_online_hack_tool_no_surveyjkxfh.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/5289280.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/xixonu/56333059496.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/aadhar_card_without_mobile_otp.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/lotesasokuva.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/japufuxalipovupatafugul.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/lalujukadijogudaxab.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_off0000c6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B9 5236 bytes
SHA-256: 8cbcb6558ab89ec554c2142d2fa9adc7a1e0f0f900a44b4085cf2e7f33e596e0
font_01_sfnt_off0000d89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89B 9988 bytes
SHA-256: a7503834cb1430c16936a84c19e01be16b16b782e9de175b01b0389d0ae3bd11

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