Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbec3d6d364371bb…

MALICIOUS

PDF

67.2 KB Created: 2020-12-21 16:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: cf87842a035a3a76fc233e8c1a958267 SHA-1: 155a66c0e783e8d198477c9e0180c80499936e96 SHA-256: cbec3d6d364371bb6dcaedc8d046d96845787e67ac8767373693f4e32f345a8f
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/123?utm_term=anime+girl+tumblr+aesthetic PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459165/normal_5fc31c9c03c9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451556/normal_5fbb799373bcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444856/normal_5fa1aad22c405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459162/normal_5fb77bb8ad5aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5f9b3a7d7f3ef.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/5fdd37888094fd3ccf307d49/t/5fdd8854f11f517dbbb131ce/1608353877737/root_checker_apk_for_android_2._2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf63615147b148042b2a1d/1606378338470/how_to_build_a_mob_grinder_1.15.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe031ce1091525336569659/t/5fe062a1f23a830a59dbad6d/1608540834773/ios_icon_template_affinity_designer.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/15688384492.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7af085fa98a681f0ffd81/t/5fcbe279a51c5a1401b6afd4/1607197306161/senior_marketing_manager_salary_los_angeles.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c7625bcb0228a28e9b31/t/5fcc1e18eb18547f4b744469/1607212572067/octonauts_and_the_whale_shark_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65321c30a162e0c778c8f/t/5fcff24d2a4d5950f4cf3c72/1607463501587/nuclear_bomb_shelter_cold_war.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc117c3a3bf4b14abaa53c7/t/5fcc176b5d2e6f3bda2b64ae/1607210860348/like_a_stumblebum_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/agathiyar_tamil_hd_movie.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51f9e5bcb0228a29dd489/t/5fd74983491a58544a2d8468/1607944579939/blue_line_library_schedule.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_off0000cb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6B 5340 bytes
SHA-256: ba5884915719e147f592a6c7548d28c0eca70ce61bd04610803c6b5e9f533bb6
font_01_sfnt_off0000dd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD70 10692 bytes
SHA-256: 0c86d752d97f2de734cbd0f012b8414019807948ec7fd3499a8ebe28cd992a80

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