Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd653bbbbfdb004…

MALICIOUS

PDF

67.2 KB Created: 2020-12-18 04:02:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 106c6355a5a8a22313989ad140df2f02 SHA-1: e03c92fa6e33f16e399f491ebd67fe1953997d36 SHA-256: cdd653bbbbfdb004714b4270893b87e0039040b14c83bf7e9080de4450c3dc42
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV as a phishing trojan. A heuristic indicates it attempts to trick the user into executing commands via the clipboard, a common social engineering tactic. The embedded URL, 'https://traffine.ru/aws?utm_term=windows+10+bootable+iso+file+free', is likely part of the lure or a download mechanism for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://traffine.ru/aws?utm_term=windows+10+bootable+iso+file+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5fb9744b92745.pdfIn PDF document text
    • https://putoluvutawubu.weebly.com/uploads/1/3/1/4/131437806/2cb5fffad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f89eed9908fc.pdfIn PDF document text
    • https://zefufewik.weebly.com/uploads/1/3/4/3/134374544/5a30b4feb1b0c26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407756/normal_5f93c000a7921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377662/normal_5fbd1e1204c47.pdfIn PDF document text
    • https://manoxumumaxu.weebly.com/uploads/1/3/4/4/134472756/7609441.pdfIn PDF document text
    • https://xinusikavafomi.weebly.com/uploads/1/3/4/3/134353784/lenuxores.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/befarekogol/betanuxobiwogawuje.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/juzaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c97f24-c76e-4579-9b8c-4dcf3bfde5c2/a_frozen_flower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30bb3640-76ee-4c8a-96d4-40eb4f452dd7/plano_cartesiano_figuras_de_animales.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/crash_course_biology_photosynthesis_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/anemia_falciforme_artigo_cientifico.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_off0000c966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC966 5340 bytes
SHA-256: 8c043b42cfa36c1f430ecf90edf4788fc88969447d210ef0e6daa5783aac13bc
font_01_sfnt_off0000dbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB9 10624 bytes
SHA-256: 97e8aa0759341db2e50cfd30b150cdc41f8292e712dfb7a82a8e994950b61fe5

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