Malicious PDF — malware analysis report

Static analysis result for SHA-256 3843ad89f1721ac5…

MALICIOUS

PDF

130.4 KB Created: 2021-02-21 05:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0958dec0a8e9c4f8d6d93de7a34757d4 SHA-1: 55830252e30ea78b954ae3db631a70e43da22497 SHA-256: 3843ad89f1721ac5ca46f5ea344e40e45e5334166cc6ddac241f10b6cb184578
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, specifically as a phishing trojan. It contains an embedded URL that redirects to a suspicious domain, likely intended to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains text related to a biblical query, suggesting a social engineering lure.

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://jacksth.ru/aws?utm_term=que+significa+buen+juicio+en+la+biblia PDF link annotation
    • http://jijimaxugixu.22web.org/chinese_character_writing_workbook.pdfIn PDF document text
    • http://wexixexebasober.22web.org/80556709487.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/e9vOVWj/namipiwirasabifalel.pdfIn PDF document text
    • https://cdn.sqhk.co/tokotuxajif/wGj9fhj/25955749176.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/jbiciis/remejixigadewopesew.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/aChfhf5/international_business_major_starting_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/chirjif/sokagifizonepofuwetitok.pdfIn PDF document text
    • https://cdn.sqhk.co/besawevij/CjeiiSC/escape_game_50_rooms_2_level_24_explanation.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/hj4IgdD/photo_editor_for_android_online.pdfIn PDF document text
    • http://sizijevoji.iblogger.org/kedejuxuvowanolov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zoribele.epizy.com/financial_literacy_certification_test_answers_2018.pdfIn PDF document text
    • http://xewaxal.epizy.com/43201352367.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/61623373541.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/16259138669.pdfIn PDF document text
    • http://borobosen.rf.gd/boating_license_florida_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/amaranthe_new_album.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/jozunirodo.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/mixed_fraction_addition_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/sojek.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/sat_answers_leaked_2019_august.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_off0001c033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C033 5232 bytes
SHA-256: eb0e6e0c4ecfea85a0d6a44884a1f633568d05cabdb0bf56c762807681898bb1
font_01_sfnt_off0001d223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D223 12588 bytes
SHA-256: ceb698273f48a84f59fb470e1330e38120c5fc8a1fa325c3463cfcd8c35d0871

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