Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e0f9aad0d6bd29…

MALICIOUS

PDF

48.1 KB Created: 2021-05-17 06:30:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: aa937953157882640bf22fac8b16a1c1 SHA-1: 8aa184a9b198a7b3de9a8614173d86a425ebbe30 SHA-256: 68e0f9aad0d6bd2930c3ba805db0d80a37082376371c5752b5fb28a1a5e641c4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a lure related to obtaining free Robux, a common tactic for distributing malware. The presence of a visual download button and instructions for handling password-protected archives further suggests a malicious workflow designed to trick users into downloading and opening a payload. Although no scripts were directly extracted, the ML classifier and heuristic firings strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.xyz/app/431946152/how-do-you-get-free-robux-without-doing-anything-game-hack
    • http://webstan.be/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://webstan.be/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://webstan.be/images/coin-master-latest-mod-apk-free-download_GM406889139.pdf
    • http://webstan.be/images/free-robux-no-verify-2021_GM431946152.pdf
    • http://webstan.be/images/coin-master-hack-app_GM406889139.pdf
    • http://webstan.be/images/free-robux-live_GM431946152.pdf
    • http://webstan.be/images/avatar-the-last-airbender-roblox_GM431946152.pdf
    • http://webstan.be/images/grab-points-login_GM431946152.pdf
    • http://webstan.be/images/free-2021-robux_GM431946152.pdf
    • http://webstan.be/images/coin-master-hack-tool-v1-9-download_GM406889139.pdf
    • http://webstan.be/images/coin-master-hack-version-33-2_GM406889139.pdf
    • http://webstan.be/images/get-free-spins-coin-master_GM406889139.pdf
    • http://webstan.be/images/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://webstan.be/images/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdf
    • http://webstan.be/images/free-robux-codes-2021_GM431946152.pdf
    • http://webstan.be/images/coin-master-free-spins-link-2021-blogger_GM406889139.pdf
    • http://webstan.be/images/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://webstan.be/images/roblox-premium-free_GM431946152.pdf
    • http://webstan.be/images/multiplayer-master-hack-coins_GM406889139.pdf
    • http://webstan.be/images/coin-master-free-blogspot_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a9c.bin
f2eb068cca03bbf1e41a84ebef3104efcdbc649f1861edbe2c37fb7aed185ac9
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9C 27600 bytes
font_01_sfnt_off0000893f.bin
9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
pdf-font-stream PDF embedded font (sfnt) at offset 0x893F 5596 bytes
font_02_sfnt_off000095e6.bin
f288fbb1ab92d6f8be6652009a81e99b9e02fb437604b8cefd24a0b2528ef73f
pdf-font-stream PDF embedded font (sfnt) at offset 0x95E6 19564 bytes