Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da2ac845fc8961a…

MALICIOUS

PDF

82.1 KB Created: 2021-03-24 17:17:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03042c027aff9d38e381eda9fa5711d6 SHA-1: f767ae377bb93b608cecc88629c6f3a2bd342253 SHA-256: 7da2ac845fc8961a0b319d114701f1110ff4e4e38fb5cb5886b12d0d05b4c1f6
96 Risk Score

Malware Insights

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

The file is a PDF document that has been flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body is heavily obfuscated, but the presence of PDF-specific heuristics and the overall detection verdict strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=population+worksheet+biology PDF link annotation
    • http://xviiivbgz.com/xixawaxepuxiriayys4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481062/normal_601132da285bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_6031cdafc2b70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489245/normal_5fc84538ae37d.pdfIn PDF document text
    • http://wiinorama.space/angry_ip_scanner_apkpure9qibf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373281/normal_5fcbc657ec4c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425507/normal_6009ce82dd603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454429/normal_60508b354c99a.pdfIn PDF document text
    • http://koolmaxt.online/vapezowifikewrdli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426696/normal_604db4243a0ba.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/leributafa/dofisamavub.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/58927674051.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/fire_emblem_awakening_reclassing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/which_focusrite_should_i_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/tisifelesorunisixi.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/how_much_is_a_new_engine_for_a_dodge_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/32097764633.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/facility_maintenance_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/vorekakulelazedabiwegimu.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/pokemon_blazed_glazed_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/broadsheet_hobart_dinner.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_off00010272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10272 5480 bytes
SHA-256: c08bbc0ac4c8ef802eafaeffcba08c2e8c1685a82b89714a7bd877e5178806be
font_01_sfnt_off00011524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11524 11116 bytes
SHA-256: a55c29c62e3a898dad474cf03a9c620a09f7485a322ed57b3c9c6789c27180dc

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