Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce5ec0287ee5667…

MALICIOUS

PDF

79.2 KB Created: 2021-04-06 13:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 20b58a68831027e55ed2c46cf692cc7e SHA-1: 88f254f6ebfa0560630788e9997a2fdb3ad1ce00 SHA-256: 2ce5ec0287ee56672ac99684f6d74b2b068c9ac3c5b75bca9ebee04436d29cad
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of an external URI pointing to 'seumenha.ru' and heuristic findings related to urgency lures suggest a phishing attempt. Although no scripts were extracted, the PDF structure and external link indicate an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://seumenha.ru/123?utm_term=nice+guidelines+for+enteral+feeding PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374704/normal_60445dd1c125f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455374/normal_604663fb38b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462976/normal_6045eae4be413.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420588/normal_60017bbf3b9b2.pdfIn PDF document text
    • https://cdn.sqhk.co/zosurinipin/hbjjnig/cooking_fever_hack_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/dubagojovo/hihjrgh/11595707679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492253/normal_5fdbe81301359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447250/normal_606a5499c86ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_6016f2baf2508.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384482/normal_5fe5a382e63b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489843/normal_606c00c69b6f7.pdfIn PDF document text
    • https://cdn.sqhk.co/jobebakegip/ifOmii0/remapitosotudavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470826/normal_60179dcf81ab8.pdfIn PDF document text
    • https://cdn.sqhk.co/bepeguvovori/nDHihOY/bubibafilejajenotilone.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/gj4hajb/sozigapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423752/normal_6058aa109cd66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/why_is_my_led_spotlight_flickering.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/71979576910.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/xovejumizezuxiz.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/gilukuresakidiwigisu.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/python_jinja_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/how_to_reset_jabra_talk_55.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/free_esl_worksheets_for_preschoolers.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/certified_information_systems_auditor_cisa_sf.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/sony_tv_program_guide_india.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_off0000f8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A4 5160 bytes
SHA-256: fc83cad4187133a125064c1244e29ff1025b93e4a499fc30a6d91d7986694073
font_01_sfnt_off00010a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A46 10724 bytes
SHA-256: 55ee15465a4aba87f97596dae4ee937c96c832bfc814fb1db6825d7cc7477814

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