Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0399b96fa086af4…

MALICIOUS

PDF

72.3 KB Created: 2021-03-01 17:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: bd01f02a1d732550399de31e16ef6536 SHA-1: 73d88dba9cddba04cf202bb6877f435b09e18128 SHA-256: b0399b96fa086af47da6c26a936a15f52d142aac5bd77eb680fd0b7157aa6e47
136 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, as malicious. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are new or changed bank instructions, a common tactic in business email compromise attacks. The embedded URL 'https://seumenha.ru/strik?utm_term=bangla+band+fossils+mp3+song+download' likely leads to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/strik?utm_term=bangla+band+fossils+mp3+song+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476954/normal_5fe54c8ead386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5fd26db4b1526.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393641/normal_60045acf5f162.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393755/normal_6006018cb65a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452851/normal_5fd0d501d78c8.pdfIn PDF document text
    • http://zespodsvetkoy.site/rochut_melodious_etudes_for_trombone4gzty.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495696/normal_5ff8dd0bb27ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403260/normal_601e8c863a6fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_6009ef976fbbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381759/normal_6035c1c8c5181.pdfIn PDF document text
    • http://help-bluebadgecenter.com/tax_audit_report_due_dateyk3xp.pdfIn PDF document text
    • http://insurancecarusa.com/31351068845evu7j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_6023ec5688e62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478716/normal_5fff56c41a7a4.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/minaxigevani/73441729593.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/how_do_teachers_afford_to_live_in_san_francisco.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_off0000dcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF2 5708 bytes
SHA-256: c625ab6c61128c912c3502a5fd7ae504986b48fa5563d8f44330d111d61d7dae
font_01_sfnt_off0000f06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06A 10396 bytes
SHA-256: 0315317baa6e20d4daa51ed9a771425cb0e8432fe9406c5774a12188344a9790

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