Malicious PDF — malware analysis report

Static analysis result for SHA-256 0973776ddc83be5b…

MALICIOUS

PDF

72.1 KB Created: 2021-02-24 02:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3dc7c40bae2738e6d7b35b923802e6c1 SHA-1: 3c6a2178943d3b076ec5d7bfd5f25e6a6ddceb82 SHA-256: 0973776ddc83be5b01ccc25fe01a62d0a23dda41bdb4a5c83024f282001329b4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'jacksth.ru', which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'interpretation of romeo and juliet prologue', which is a common tactic for phishing or malware delivery.

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://jacksth.ru/aws?utm_term=interpretation+of+romeo+and+juliet+prologue PDF link annotation
    • http://copyright-services-us.com/diamond_colour_clarity_guideeh58y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496372/normal_601f3887ca500.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/7brKzpP/five_nights_at_freddy_s_2_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455381/normal_60196f9e3853d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473049/normal_5fcaa19bdc219.pdfIn PDF document text
    • http://goodnaturak.space/mefedivawinicui6m.pdfIn PDF document text
    • http://matrixbicycles.com/canada_visa_forum_citizenship_spreadsheet_2018ov5ls.pdfIn PDF document text
    • https://cdn.sqhk.co/dugubupa/jh2Z5Rj/36804854505.pdfIn PDF document text
    • http://stavki-na-sport.site/kowugofanutuzejudopi7us7f.pdfIn PDF document text
    • http://arthromedro.xyz/malamepaludiliwovumuxr7l02.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/G1wmjic/91190355142.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/xerezutovidoruwobq0a0w.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/tobobowu/the_psalms_workbook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/gupiwelevatonuvija.pdfIn PDF document text
    • http://daxevekiwenux.epizy.com/math_facts_practice_sheets_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/canadian_visa_application_form_imm_5707.pdfIn PDF document text
    • http://lupewozer.rf.gd/kedepawelufere.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/32372807600.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/fire_emblem_heroes_build_guide.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_off0000dd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD44 5196 bytes
SHA-256: 384a9d1e76339a99bd4cc98afcdc35b0a8a37bc2ddebf49bb194a09009ef4967
font_01_sfnt_off0000eee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE1 10560 bytes
SHA-256: ea96c10cf39c470eede7a0327643538e2596358a59ad43ddba0637cfa16b9fc8

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