Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e63f74c83fe0520…

MALICIOUS

PDF

71.6 KB Created: 2021-02-15 19:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c044dee3ec4d099f29c3b92d758c0808 SHA-1: ebf5b78dd0a6c8913a6cda100af9318baab05157 SHA-256: 6e63f74c83fe0520956a3b4a5be68d4b5b6760572eae8c567e8f177228765215
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website disguised as a search result. This URL, https://leonvi.ru/wb?keyword=graphic%20novels%20for%207-9%20year%20olds, is likely part of a phishing or social engineering campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=graphic%20novels%20for%207-9%20year%20olds PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454056/normal_601f723bdb048.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485012/normal_5fc7df71787c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424953/normal_6004140ab198c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_6023c0d59ef5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469626/normal_6016f5487e963.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458404/normal_5fd1d13d260bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427284/normal_5ff9cd83201d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_600e4c765d7ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391319/normal_60070153673f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366993/normal_5ff3a9310c558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410986/normal_60054c4a07e46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_5fda4ce02218f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386366/normal_600ab3fc393d5.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/feliso/ionic_change_android_version_code.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/real_estate_independent_contractor_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/6196705395.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/bemujokosegotok.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/chesnara_plc_annual_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/cron_job_schedule_format_every_5_minutes.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/applying_for_a_job_by_email_template.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_off0000d8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BA 5704 bytes
SHA-256: e266f6c1a3bf53f7b32cfa50558f6815a61cb639c127860a7ab1bcebb0ced45c
font_01_sfnt_off0000ec3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3C 10388 bytes
SHA-256: d94cc32fd4a6a6f3f5c9e9ee124bedf38a567dba70769e8714790311604310ed

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