Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6253786bfcbfaad…

MALICIOUS

PDF

65.8 KB Created: 2021-04-03 05:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2dc743924fd1b9dfb91a22f463cbc971 SHA-1: 747434b1247856dcbfd246d5d76440b65648d201 SHA-256: b6253786bfcbfaad31948c89d2e2ee23692ffb7099b3fcd227093b8d4ad94318
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The presence of embedded URLs and the ML/ClamAV detections strongly suggest a malicious intent to deceive users.

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://seumenha.ru/award?keyword=obligationenrecht+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408352/normal_603eebb62517b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420765/normal_5fc8fde96c07c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450036/normal_5ff2131accb91.pdfIn PDF document text
    • https://cdn.sqhk.co/vubiwete/nJThf7y/watch_live_nfl_preseason_games_online_for_free.pdfIn PDF document text
    • https://cdn.sqhk.co/datimemovuko/gfJW6mB/nisuxifezinixaz.pdfIn PDF document text
    • https://cdn.sqhk.co/zalenelavup/bijMiaS/52816271147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486535/normal_5fca707b4b82e.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/YEUgj1Z/fobima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458614/normal_600e98d72edd2.pdfIn PDF document text
    • https://cdn.sqhk.co/rudolikube/c8Ti0UL/du_pre_approval_letter.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/dggk5Pb/underseat_storage_f150.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/hahK0hi/loxulesisiziz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489846/normal_601b6436f414a.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/xoxaneral/mawipi.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/punjabi_song_chitta_teji_sandhu.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/breast_cancer_ribbon_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/the_tyrants_tomb_release_date_australia.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_off0000c458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC458 5496 bytes
SHA-256: b7638e98a3793c9d8958b144ed1b6fa4b565a668d516c8eb67cb855b90708a0a
font_01_sfnt_off0000d711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 10356 bytes
SHA-256: 6c0cc31ad2740e0a4ee114edc7bca2415b968d9648d8b2789300a0a91b5b6e07

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