Malicious PDF — malware analysis report

Static analysis result for SHA-256 5217011074535770…

MALICIOUS

PDF

46.2 KB Created: 2021-06-07 13:17:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c9c01ed11d84823a0652ab4298a54b40 SHA-1: 66949bb3710c53467dbff86b0ab5204a6a11d72d SHA-256: 52170110745357703eca404ffcc375c2b548017e4e0ca4d8c8f5cb9fa943cd9b
82 Risk Score

Malware Insights

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

The document presents a lure for free in-game currency, directing users to a URL that likely hosts a malicious payload. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document attempts to trick the user into executing commands, a common tactic for malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit vulnerabilities or trick the user into downloading and executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/431946152/400-robux-for-free-game-hack PDF link annotation
    • http://vedrachemicals.ro/images/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/100-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-minecraft-website_GM479516143.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_off00005378.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5378 27520 bytes
SHA-256: dc7db60d4c80b076411795c46fb0ad019d9abf85770ca275338ce6e439b88588
font_01_sfnt_off0000920f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920F 18248 bytes
SHA-256: 64244ff7ea5718d3e816f63144b76027cd92da0f75e270f7840ef2f392f3d8b2

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