Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ef20ae410e1c00…

MALICIOUS

PDF

72.1 KB Created: 2021-02-27 21:15:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ea439da2ebe647bf2d160be889f0ac52 SHA-1: d094672a6431a7252255adb3baffdaa82f368b38 SHA-256: 57ef20ae410e1c00dc7eb8def1f7a014f8daf235f80263bf94558dd0d5bcd968
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this assessment. Although no scripts were explicitly extracted, the presence of external links within a PDF document, especially one flagged as malicious, suggests it is likely designed to redirect users to a phishing or malware distribution site.

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://xajibur.ru/award?keyword=la+vida+precoz+y+breve+de+sabina+rivas+pel%25C3%25ADcula+completa+espa%25C3%25B1ol PDF link annotation
    • http://jepenufi.getenjoyment.net/kivuweleg.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/how_do_i_reset_my_idylis_air_purifier.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/75290449433.pdfIn PDF document text
    • http://helpcenter.business/tejipuloxub7md56.pdfIn PDF document text
    • http://findssldz.xyz/email_writing_template_examplesr3m9e.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/53140033034.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/xilogerigiratusagin.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/wenobagupexekap/schengen_visa_application_form_for_netherlands.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/apostrophe_in_possessive_nouns_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/shipping_container_house_floor_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/15001659361.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/50368910890.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/sudutuwebalilivumuloki.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/fugiruvurawewiwomoredovos.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/92543200568.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/guidelines_for_colonoscopy_after_colon_cancer.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_off0000d7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E0 5780 bytes
SHA-256: 6be4d80e98105a6a3ea98b4e86634f9f1b4b47fbb2a4a0e307a57edc0293ea79
font_01_sfnt_off0000eb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB43 11156 bytes
SHA-256: 9b8e2c365bd3532cf53207ee79a6d51a912af69a4553d0da36f8bef5362be95d

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