Malicious PDF — malware analysis report

Static analysis result for SHA-256 6395128aece5b2a1…

MALICIOUS

PDF

33.0 KB Created: 2021-07-06 07:22:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fccaf8a152c223caeb759cd973312e5d SHA-1: 1aec58804cc311e9ef63ae0a235771c773de9079 SHA-256: 6395128aece5b2a136ca5209ccf81802e15adb4576e81774345dc9ff1ef8477e
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and text referencing free in-game items and cheats for popular games, strongly suggesting a phishing or malware distribution lure. The presence of the URL http://netcdn.tw/app/479516143/free-minecraft-severs-game-hack, combined with the ML_NYX_PDF_MALICIOUS heuristic firing, indicates a high likelihood of malicious intent. While no scripts were explicitly extracted, the document's structure and content point towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.tw/app/479516143/free-minecraft-severs-game-hack PDF link annotation
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/pastebin-com-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/cheat-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/10m-8-7m-17-free-robux-daily-robuxian_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F68 21836 bytes
SHA-256: e393acf38c7b5f2eea2ba9fe3aea741098d30c0381259d817594a565f3e4d207
font_01_sfnt_off00005f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F18 17968 bytes
SHA-256: 48bc55e03208a8f2bb08e2877cb4566e36c68f2d0f6b3425dea205355258b605

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