Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9a2860f95793f8…

MALICIOUS

PDF

77.2 KB Created: 2021-02-24 07:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ed73ec4f0768782321ca0da1f014d437 SHA-1: dc708dc00a0ae3b12ebbe356a44724eddcb0bd7b SHA-256: 2c9a2860f95793f84ab9074a9405c79552372b2a6c561081a3be49560dbeca70
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to an 'English composition course', suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=english+composition+course PDF link annotation
    • http://medtechnika1.ru/687697577674nqlj.pdfIn PDF document text
    • https://cdn.sqhk.co/lumolixuwo/ijfJORY/36660051036.pdfIn PDF document text
    • http://revershjtb.site/93542910275dgpnh.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/4WfXfja/38938504965.pdfIn PDF document text
    • http://regvoolkim.website/making_inferences_worksheets_for_second_grade9se3o.pdfIn PDF document text
    • http://gratoramaa.space/1270684851712jyk.pdfIn PDF document text
    • http://naturapple.space/1009120985418dhw.pdfIn PDF document text
    • http://arfesopt.com/ssr_side_by_side_170_partsf6rl2.pdfIn PDF document text
    • http://genoray.pro/barcos_que_vuelan_descargarosw22.pdfIn PDF document text
    • http://ritual-venki.online/wixiromavowiraboxivaxoden20im.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_602b2d68b1987.pdfIn PDF document text
    • http://itverys.space/what_exercises_will_help_plantar_fasciitis8ovkj.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/dapekufoxiraku/luladuwigukasu.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/android_games_graphics_problem.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/al_ittihad_jeddah_fc_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/suxusaxevumafogujasipa.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/82130781622.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_off0000f1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 5096 bytes
SHA-256: c075ea488c640ecbbeb45389cebaca2c263c9458af0f6b2599969a59d9f1f790
font_01_sfnt_off0001031b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031B 10700 bytes
SHA-256: bee1d0ddcad198e67bd59179855cd1704869f9c39e46c6f275b2e5ca5479ad5e

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