Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2ef0d2a4d9ef38…

MALICIOUS

PDF

51.1 KB Created: 2021-06-04 02:06:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d94714c6447d6b4d45c07b8380aaf9b8 SHA-1: d470f0fa74529e1cad931a311412fe716d36e2d6 SHA-256: 7c2ef0d2a4d9ef381a04ce637ffac3249673c202d21e49461bf7fc3fcfdaaef7
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run lure and a clipboard-command (paste-and-run) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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 https://netcdn.online/app/431946152/free-robux-no-gift-card-game-hack PDF link annotation
    • http://oca.undil.tl/repository/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/tiktok-free-4k_GM835599320.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-pokeballs-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/robux-hack-no-offers_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • https://direct-link.netIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FA0 31524 bytes
SHA-256: 5a8d42e9cfd24367aeca6b9d6a20200e46833869f199ee5004030eb7602c550a
font_01_sfnt_off00009774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9774 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off0000a41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA41C 18640 bytes
SHA-256: 5e2a3e67d4e6faa48e47b93c69738121aad1fd6f7e815cfd3538255806571323

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