Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c09047edf10c0c6…

MALICIOUS

PDF

65.5 KB Created: 2021-02-25 19:58:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 442f57a492f116a6ec7175b59f670a82 SHA-1: 419779cfe758568335e82f00665c3cdc72bf0c04 SHA-256: 5c09047edf10c0c6e042349f9a724d120240e29c89a608ab8f3f94789aba9196
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=explain+why+the+complex+fe%2528h2o%25296+3%252B+is+coloured In PDF document text
    • https://cdn.sqhk.co/koxixoneto/UkmjL4v/air_attack_2_mod_apk_1._3._0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453342/normal_6034f1ab969fc.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/viva_el_toro_book_chapter_1.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/UghhcuY/gexujokabezogorap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369665/normal_5fcb4b4ed19b0.pdfIn PDF document text
    • http://terugate.mypressonline.com/30444982721.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/gjgjZxx/ladimawuzavex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458829/normal_60149f0d842f7.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/what_is_the_theme_of_the_book_the_curious_incident_of_the_dog_in_the_nighttime.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/will_no_game_no_life_ever_get_a_season_2.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/diatFhb/teddi_mellencamp_arroyave_age.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/jezekemunidup/sukari.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/40978972762.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/vidmate_all_video_er_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/54340761870.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/houghton_mifflin_math_grade_5_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/sublet_agreement_template_bc.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/lexuzetewanamuzunujakawal.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_off0000c1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A8 6220 bytes
SHA-256: 8c8416bbf0263adba9cc8059303e3d8a90e7e626121316f9fb67476966ee4329
font_01_sfnt_off0000d6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D0 9820 bytes
SHA-256: c4fa03b59c535001aa2b2785f0897bd0b1823f8a7e79e5a5421c7f03b60d322a

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