Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c87cf406cac171a…

MALICIOUS

PDF

71.4 KB Created: 2021-04-04 03:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7804b11be05798261497db519e67bc19 SHA-1: 5de20d4fb7b9dbd8c2a53cdfb416359a905a5d02 SHA-256: 6c87cf406cac171a89e8e7db8edee8e6ca34a9cbfb380a1a9cc8257afd2881dc
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 0.9994

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://nipisod.ru/strik?utm_term=aprendizajes+clave+primaria+segundo+grado+2017 PDF link annotation
    • https://cdn.sqhk.co/bokirebi/hchiWUp/android_contacts_widget_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_6018b81d145d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_6056dadff2c26.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/bngedbI/computer_style_lock_screen_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451047/normal_5fcf04e9d1736.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/bhajgHw/weather_radar_nyc_now.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407724/normal_5fcf021283f13.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/terupulibibaropowi.pdfIn PDF document text
    • https://cdn.sqhk.co/faresawuf/ahcjcif/saluregizov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_605b8f492614a.pdfIn PDF document text
    • https://cdn.sqhk.co/wowobavukelo/higeggp/26097158639.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/bank_note_press_dewas_recruitment.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kipijitifexus.epizy.com/degree_botany_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/bubble_sheet_mask_sugu.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/19375320829.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/vixonuselumagumen.pdfIn PDF document text
    • http://fojakosi.atwebpages.com/remington_550-1_side_scope_mount.pdfIn PDF document text
    • http://nolumuj.epizy.com/sanitation_worker_exam_guide.pdfIn PDF document text
    • http://padubarejibuso.rf.gd/8293726780.pdfIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_c9b72765b82e456fbcacc997aff6a6ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovugi/autodesk_autocad_2014_installation_guide.pdfIn PDF document text
    • https://68f22c9b-09e1-4ffb-8b85-48f7de090316.filesusr.com/ugd/39a0fd_9b8c5a05582c47a2a195e7dc04df4a06.pdf?index=trueIn PDF document text
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_5448f581eda04f05be816e3c63928f4c.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F9 5776 bytes
SHA-256: ec31c8cb804727697d4f7a0b483e79c12f0d190eaeedd7b1fd2ea130923089f0
font_01_sfnt_off0000dd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 10856 bytes
SHA-256: d120f68f68a614982f4415fd9cc17ba887b8ef9099a261457721989b7e3ed782
font_02_sfnt_off00010175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10175 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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