Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b3c4bacd958bf8…

MALICIOUS

PDF

36.2 KB Created: 2021-06-20 00:22:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 36ef636b2e397e77f662ab7dc4afeee5 SHA-1: 3519e817ea17e6ec07a153201dde4c7df2d72daa SHA-256: 03b3c4bacd958bf873e3f2bf14d8ce35fb5769cf4e55a6fccf45944ea45e3f4e
102 Risk Score

Malware Insights

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

The document body and embedded URLs suggest a lure for downloading game cheats or hacks, which is a common tactic for distributing malware. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document may instruct the user to execute commands, potentially to download and run a second-stage payload. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.co/app/431946152/roblox-how-to-get-free-lvl-7-hack-2021-august-game-hack PDF link annotation
    • http://183.91.70.11/repository/get-minecraft-for-free_GM479516143.pdfPDF link annotation
    • http://183.91.70.11/repository/synapse-x-roblox-free-download-2021_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://183.91.70.11/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/how-to-cheat-piano-on-roblox_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/hacker-roblox-00_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/games-for-free-like-roblox_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/dragon-balll-rage-roblox-hack_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/animations-give-free-robux-robuxian_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/how-to-hack-into-someones-roblox-sever_GM431946152.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_off0000341c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x341C 22532 bytes
SHA-256: 3387d9b812e7913495d1add7413d113229e2b3741fa49fec9d6b09f195932e10
font_01_sfnt_off00006638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6638 19800 bytes
SHA-256: bc73d0d06cdd5901652faa90e24fee729f44bf96cfafa3ebf7db4027eb552f1c

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