Malicious PDF — malware analysis report

Static analysis result for SHA-256 51afb19f43787e7a…

MALICIOUS

PDF

73.4 KB Created: 2021-02-19 23:08:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 21b3cfcdd91d5fa6aa059638d7f8a0e6 SHA-1: 0fafd96012f5bd155f0b07ef1da88619cafe4037 SHA-256: 51afb19f43787e7a8d1eb354784236d6f4a61d2566f5ae734a38144d893f01bd
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when visited, likely leads to a phishing or malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though partially corrupted, suggests a lure related to 'painting ideas for childcare' to entice users to click the external link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wb?keyword=painting%20ideas%20for%20childcare PDF link annotation
    • http://mydenverneighborhoods.com/54241124971qd7c7.pdfIn PDF document text
    • http://liketime.fun/led_zeppelin_dazed_and_confused_tabp6mbm.pdfIn PDF document text
    • http://flymoney.net/after_book_series_parents_guide269un.pdfIn PDF document text
    • http://bred-enligne.com/setijiviyqn4b.pdfIn PDF document text
    • http://prechambre.xyz/avery_label_template_5161_wordju5jw.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/igifdjj/kekejesubuxugi.pdfIn PDF document text
    • http://smallita.space/sas_essentialshlwhr.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/jdjjCt9/98434639415.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/jbid49w/3d_city_driving_games_for_pc.pdfIn PDF document text
    • http://cardioactiveufficiale.site/watch_transporter_2_onlineews09.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/damerirazib/video_file_format_browser_support.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/java_code_formatting_in_notepad.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/75423731132.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/sojere.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/bed_sheets_king_size_cotton.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/dependent_and_independent_compound_events_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/kertas_kerja_sarang_burung_walet.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/zipugoxejeluwexit.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/transformar_radianes_a_grados_centesimales.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/78399375282.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/asbestos_sheet_cost_in_madurai.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_off0000e29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29C 5284 bytes
SHA-256: aacb45d06426f288d63b46fcab9df4cf8f83ae1b063c0bc0961ed2b311753c72
font_01_sfnt_off0000f495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 10420 bytes
SHA-256: 873ed3d91fe316fbf91da2c8b5dadecc160f4a91095185efc562636ea1d8cafa

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