Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3579ea8eb2dcf2e…

MALICIOUS

PDF

75.3 KB Created: 2021-05-02 22:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d92976c31c0007f7155dbf1afa4f9e6a SHA-1: 22689d28ce54b85629ab32029a0395e944d61c89 SHA-256: b3579ea8eb2dcf2eb26aba2f7131465ba465cd9001c1dbae0155b6f2cfd1858b
96 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://seumenha.ru/strik?utm_term=php+html+to+excel', which is the primary indicator of compromise. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=php+html+to+excel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414335/normal_605c5cf228ba1.pdfIn PDF document text
    • http://wuwudikosegukem.mypressonline.com/sondagem_vesical_de_alivio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454420/normal_605fe6c0513ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393029/normal_5ff0e89934e6d.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/pupogavagenobipefonuri.pdfIn PDF document text
    • http://lorozetuwivu.medianewsonline.com/3895570216.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377381/normal_5fce8d6842850.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/temujonuwu/finofegefepepisikiw.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/casio_sea_pathfinder_watch_2572_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/customer_experience_questions_and_answers.pdfIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_2680f25822694f199ade0713c82009ec.pdf?index=trueIn PDF document text
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_5acfc281e83244cda608b67ffd95a382.pdf?index=trueIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_496f7d499b7847b4a8c5edc5f944ec1e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/jivixol.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_e3db692a48324c529ab5ae1a05c9eb04.pdf?index=trueIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_7bfdf328e4da452e9194327420d29edf.pdf?index=trueIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_edaa466af0554dc9958f7704a324cc22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mizeteb/kuruvoja.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/26985288649.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/ridobivijo.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_7510e6c8c1a844f3a2076ec9cfefa400.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_81ef308073b0402d9f7eaa755705fa5d.pdf?index=trueIn 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_off0000eacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACF 4760 bytes
SHA-256: a5e7436cf4ca5ada13e3225db9bc3ac71774ca82a8158e984d2d1a2688101e69
font_01_sfnt_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 11024 bytes
SHA-256: c9fc77328f5d9d1c9f434772b65916ec99739f6b979639db66e62bc4d9d7018c

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