Malicious PDF — malware analysis report

Static analysis result for SHA-256 142392af4e287150…

MALICIOUS

PDF

76.5 KB Created: 2020-12-30 11:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6d962af408b506ee1de2a1f7d94351f5 SHA-1: 1c665a1e11dd033c4f1fb0ddfff18f8ec58da951 SHA-256: 142392af4e2871505d4fddb4c33ce27e964fd1d7c71ea260e32541151a8d593e
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 0.9998

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
  • 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=industrial+factory+sounds In PDF document text
    • https://cdn.sqhk.co/lezagononek/chbhhzk/dazututulojalusedejifewi.pdfIn PDF document text
    • https://cdn.sqhk.co/poxufape/jbhgcgj/3d_printing_soccer_cleats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391008/normal_5f9d74b3e6af8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f97e738c7913.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/Vghhjjc/76423819656.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
    • https://s3.amazonaws.com/wiwamoxamo/balupu_movie_bgms_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/lagu_i_like_me_better_karaoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfa48e4-e80e-43f6-a01c-b710200b07ee/simple_backgammon_rules_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/rakonezum/the_campaign_full_movie_123.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/xulogajuwozefuvusunofoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8aafa4b-31e0-474d-ab48-17d5a62ea5f5/importar_excel_para_firebird_ibexper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f25a9a67-c11a-40a6-8e14-e6c3b229269e/conductivity_lab_chemistry_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/national_achievement_test_answer_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/harvard_referencing_style_simple_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/mipujomuzib.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC4 4820 bytes
SHA-256: 4383253a03aca6d70f34be6a967e76a57f27ec74d76db4e36dbee9a5bbbfc957
font_01_sfnt_off0000f026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF026 11652 bytes
SHA-256: b9b53d0c2e41b8153cf1c25da218293fec603482980c2cda7d137123eb1c65cc
font_02_sfnt_off000115ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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