Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d679ad8b59e6be…

MALICIOUS

PDF

65.2 KB Created: 2021-02-13 20:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: f4ccb6ae28f5e0534a1510ec3f0aa55e SHA-1: 3672c96cc98c828f14070b61cff245e180552581 SHA-256: 94d679ad8b59e6bedfa2bdf818b10ebbd8deb0cb2cbd4d43395207123b738b99
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, identifying it as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to educational materials.

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://seumenha.ru/wix?keyword=lenses+worksheet+answer+key PDF link annotation
    • http://trells.space/pakoradilugegezorabekowrysyv.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/79294982825kyi4h.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/ITjdhcY/senetagakenozodelonix.pdfIn PDF document text
    • http://alcexpress3.xyz/guxiretow6do4o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nisinukodepafix.rf.gd/performance_appraisal_comments_for_managers.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/rezinosikelido.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/mcgraw_hill_biology_30_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/debussy_clair_de_lune_violin_sheet_music.pdfIn PDF document text
    • http://legopabez.rf.gd/boombah_uniform_builder.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/8748358757.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/44768565647.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/free_digital_marketing_plan_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/vegetarian_cannibal_hd_movie.pdfIn PDF document text
    • http://mamuzov.rf.gd/dushman_1971_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/photo_editor_apk_for_android_2._3.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/slip_sheet_fork_truck_attachment.pdfIn PDF document text
    • http://pudunajuge.rf.gd/61619285086.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_off0000c512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC512 4940 bytes
SHA-256: f47aea4d169a92e0904d601cf987e94cfc8fa1f2c919aa5226d40ad86f2280fd
font_01_sfnt_off0000d5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F1 9932 bytes
SHA-256: d1e46a3ce3af47f804529957b6888abd6cea8c1bbe4eb9e75efcab22ea236c28

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