Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ef9a62736d6144…

MALICIOUS

PDF

75.5 KB Created: 2021-02-26 11:54:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c6c94cca858d37251996a6410c390718 SHA-1: 8ebb2ab333ca9e8119311bd68038c449902f694b SHA-256: 92ef9a62736d6144afc17d1744cf7ab1f71972aa3e85e0ad9c104b4ad413b163
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains heuristics indicating it's a malicious phishing document, specifically designed to trick users into executing commands. It also includes a URL that appears to be related to a password reset, potentially part of a social engineering lure. The ClamAV detection further confirms its malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ponafet.ru/strik?utm_term=d%2527link+dcs-932l+password+reset PDF link annotation
    • https://cdn.sqhk.co/ralofobo/d7Mgf87/2268694521.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477649/normal_6001561c62aca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415531/normal_5fc8ad97e0492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_6017280c96835.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/viahahc/liteno.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/jgYgdMJ/wuperodoso.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/haEvigi/best_linkin_park_offline_lyric_download.pdfIn PDF document text
    • https://cdn.sqhk.co/paxelababeg/whbggii/dulomobuwutasaligoxotana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423166/normal_6033ce6b99c25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452835/normal_5fe52d8065d2e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimiromomekex.epizy.com/3d_warehouse_sketchup_pro_8.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/janobubudojirisoto.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/recliner_mechanism_lazy_boy_electric_recliner_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/family_life_merit_badge_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/fefatodowaborukedugozogo.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/metallography_of_aluminum_alloys.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_off0000e8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B3 5740 bytes
SHA-256: 3abd6cbdb56c8a10922074d523b3ef0a9b8754538b86aa9a3f2a070bd8baddff
font_01_sfnt_off0000fc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6A 10592 bytes
SHA-256: 7bed835186d472af7e047971fdd9ed0ef1a905a2490bdcb7d61ce7a7c1d99a1c

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