Malicious PDF — malware analysis report

Static analysis result for SHA-256 068865cdbbfa5c3b…

MALICIOUS

PDF

74.9 KB Created: 2021-02-24 22:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fb1117d1971d31105e29339caa1c55fd SHA-1: 7f41ef25fcd3ccfb8e54cc7722f0019f7fc8afef SHA-256: 068865cdbbfa5c3bb4e126688532a2c170963716175a1f7bb12fff2ad85f7782
136 Risk Score

Malware Insights

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

The PDF contains multiple suspicious URLs, with one explicitly noted as an invisible link lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text fragments that, combined with the heuristics, suggest a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://leonvi.ru/award?keyword=define+flowchart+proof PDF link annotation
    • http://xepidenad.scienceontheweb.net/27334976384.pdfIn PDF document text
    • http://dalnoboyi.xyz/widojujibafgjem.pdfIn PDF document text
    • http://managerprogram.live/chest_warfarin_reversal_guidelinesjmt6e.pdfIn PDF document text
    • http://itagreen.fun/dufomevavitenozapigbz4q9.pdfIn PDF document text
    • http://figebofisekozoj.22web.org/cervical_cancer_screening_guidelines_2018.pdfIn PDF document text
    • http://fekibuzov.iblogger.org/79924176524.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/fosalizuzu/canon_pixma_ip1000_driver_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/bailey_and_love_mcq.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/acapella_christmas_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/47598199617.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/bingo_card_template_word_document.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/excel_set_header_footer_for_all_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/fizaxuvib.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/31461978658.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/33558309437.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/wallpaper_3d_apk.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_off0000eac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC7 5016 bytes
SHA-256: 94e9e4c8030096505797b1cbd9a20ee51c0f974889b4cbf0fb621cab3b7a4a62
font_01_sfnt_off0000fbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF2 10160 bytes
SHA-256: c0ce1db80ebb3fa465ab07fd6ad8daddef9f85930f58ca6574770f6841378a13

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