Malicious PDF — malware analysis report

Static analysis result for SHA-256 b08491761ce7d686…

MALICIOUS

PDF

75.1 KB Created: 2020-12-04 21:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 48c79391fcf4c8bd3f86d8717b598df3 SHA-1: 1546b9049eb1bc3eaeae5a36cde79b67334e49f7 SHA-256: b08491761ce7d686294debb207bf40935d625438e6df5b2f8fa358091aa6cf73
162 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. It uses an urgency-based lure. 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 0.9998

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/123?utm_term=national+association+of+pastoral+musicians In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa3c7fa-f091-4652-8c02-422a9c251c8f/delta_woodworking_tool_manuals.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1fe14e98326c02d8de42/1606295522630/migikawajobonelamav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b680e721-1250-4d0b-8512-cac6420e2e20/gartner_managed_security_services_magic_quadrant_2018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfb2312cf09257bd651d14/t/5fc131b361e25426e1633ea7/1606496693185/world_wide_remotes_programming_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e552ec917750a3d7e003/t/5fc0f77064571256545e2575/1606481779927/the_human_animal_book_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4b72173fb5383b9882b5/1606372210017/51308415137.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffcc36609fd0ee78c2f31/t/5fc794c73d56556d1442015d/1606915272227/24501651593.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6ab7f8cdb769c6db44c4/1606380216453/free_breakout_games_to_play_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57b87be9b69395129d29e/t/5fc79756b7521d608a4aaf32/1606915926774/business_boutique_planner_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09092e97-1c40-4bca-a599-ebea68b93ff4/33242431743.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e800a879396864085b93/t/5fc1369c9b1ed0353807f135/1606497950668/60945879255.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2abe011f6a41984911435/t/5fc827d16652ad59ec1ddd5e/1606952913781/51578971522.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf686b3c02f22b9d059ad1/1606379628579/act_67c_practice_reading_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54e01affbf90a6607a482/t/5fc89660b0f45b2a3d295fea/1606981217860/88246974956.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbca2e537a05ef08df7c/t/5fc34f059ee0f32b87bd656a/1606635269572/edelbrock_manual_choke.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6B 5132 bytes
SHA-256: 93a939e70dc983f5f02ded4962c8ef5d039b8658cd9f585a4bb60eceeb6e9b4c
font_01_sfnt_off0000ded2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED2 12912 bytes
SHA-256: c90cb52085ab8ae15ac013219f03d2dfabc132a71c120804aaee37c4607ff4f6
font_02_sfnt_off0001075c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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