Malicious PDF — malware analysis report

Static analysis result for SHA-256 274c1d108ce27041…

MALICIOUS

PDF

49.7 KB Created: 2021-06-10 21:05:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 21dc2b9f9ffbd6e8cc3e6b79017d9b95 SHA-1: d6cdd5504a45a80afd20733e6f79321e1145c2d7 SHA-256: 274c1d108ce27041933b69b51438a9b99aaaceb46aa41f57ab76d2caa1de7c7a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.003 Windows Command Shell

The PDF document contains numerous embedded URLs and a lure for downloading game hacks, indicating a phishing or scam attempt. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document attempts to trick the user into executing commands via the clipboard, likely to download and run a second-stage payload. The presence of multiple suspicious URLs reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-hack-no-survey-or-download-2021-game-hack PDF link annotation
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-apocalipse-rising-hack-dll_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-parkour-free-running-game-pass-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/tiktok-free-view-iphone-6s_GM835599320.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-clothes-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-hacks-ps4_GM479516143.pdfIn 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
stream_004_off00005257.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5257 26328 bytes
SHA-256: 34509df7b0deed71e50a62c121a0704847770856e0dc44eb0c9f2ab595cc4899
font_01_sfnt_off00008e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E63 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B75 19524 bytes
SHA-256: 1de6a808486fcb09bbdb2d8bc92ba7bf6f2b7078805c64eeb7811a38d38e1e0f

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