Malicious PDF — malware analysis report

Static analysis result for SHA-256 7acd01b9dbc30a00…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 01:31:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e7a3c3dc7013939af67bd3864102309a SHA-1: dff8b232b95574c843f65c58a37504f409423144 SHA-256: 7acd01b9dbc30a00f2a17fd45476f287074272de7f8cb59a16bfeac72913b1d8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1203 Exploitation for Client Execution

This PDF document is identified as malicious by an ML classifier and contains multiple embedded URLs. The document body, though partially corrupted, suggests a lure for free game hacks or downloads, aligning with a spearphishing attachment tactic. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to paste commands into a shell, potentially leading to the execution of a second-stage payload downloaded from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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
  • 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/479516143/minecraft-that-you-can-play-for-free-game-hack PDF link annotation
    • http://pustakasma.nurulfikri.sch.id/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/tiktok-free-crunchyroll_GM835599320.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-lucky-patcher-hack_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
stream_004_off000051f3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F3 25300 bytes
SHA-256: 04ff8f207f521858d10a832edb15e3038a4c243d6acb3c06541cf4494108609a
font_01_sfnt_off00008b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2C 18588 bytes
SHA-256: c2b8d9ff41b5817f39fe12fa9914c2498059949854f0a019c9b111e2507a5aed

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