Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8f7f194d0c752e…

MALICIOUS

PDF

62.3 KB Created: 2020-12-15 14:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b5f65d005cb70ae699d515f08d8a62a5 SHA-1: 975de7021a7e66d7f8bc1afa06ec6293b6733b24 SHA-256: 8d8f7f194d0c752e4e7b466be87cb181ae2f0b64cdb57629f7063cbdc9d65686
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://cctraff.ru/strik?utm_term=manual+mitsubishi+lancer+for+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_5fb5b38258287.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5072ec14dfd36fe0c117c/t/5fc7b4158f07963615840383/1606923286522/jusebanixaximazuzi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79cbd418d7934ac780470/t/5fd66dc2313c42342b8ee535/1607888323720/sugoxadabejuvilabefa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56b7cbf71053ccb2dfd66/t/5fcfff806e9f3108817e514d/1607466880716/alien_invaders_game_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0805cd49dd12447321748/t/5fc2ec2f9ee0f32b87b44fc2/1606609968245/toastmasters_officer_installation_script.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0055e5687f52b6b7c450a/t/5fc1b716145a8629dcf0ea36/1606530839961/hamlet_act_1_scene_1_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce6f2fe3801a230efcbd57/t/5fd67175ffab5d3c56fc8968/1607889271775/vijolidixokuwu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0474c7afe470b5575075/1606222965066/xobusunewifener.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf156145a8629dc75ab2b/1606283607410/54663908013.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3886edf132613bbce4a16/t/5fd2314599fe644e8a6abdf4/1607610693877/kebifajowiwaponufomab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce397f4e85dd6b25168a85/t/5fd21b0a23f2866aa390ad9d/1607605005071/whatsapp_status_video_download_app.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52e698ef7301f8b2ce2bf/t/5fc967e78c8de970682065b9/1607034856510/comic_book_animated_movies_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc595b3c14dfd36fe115843/t/5fd639220f11661d4c262d49/1607874851833/lost_in_japan_acapella_sheet_music.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_off0000b5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F5 5264 bytes
SHA-256: 92bde8823629c1468a5dc59e05634934542f3fea7ff231d2625f753d5dd90a4e
font_01_sfnt_off0000c7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BF 10856 bytes
SHA-256: 205895da9f443cb704a1fa0b589b5944032ecb8faba8a12a1d3062a2b61f2804

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