Malicious PDF — malware analysis report

Static analysis result for SHA-256 607e368e07a6e4b7…

MALICIOUS

PDF

50.6 KB Created: 2021-06-07 14:31:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6e267aeba29af1d5435184a9be418d1f SHA-1: 776579958efa9c231134721aaee55fbfac468684 SHA-256: 607e368e07a6e4b770cd1ccec4ed5d7c0c3534375b9a79f18b007fbbc6663db3
82 Risk Score

Malware Insights

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

The document presents itself as a game hack for Roblox, a common lure for users seeking unauthorized advantages. It contains multiple embedded URLs pointing to potentially malicious download sites, and the ML classifier strongly indicates malicious intent. The heuristic for a browser installation lure suggests the user is prompted to install something to proceed, which is a common method for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/hack-for-elemental-battleground-roblox-game-hack
    • http://linens.kiev.ua/images/coin-master-hack-mod-apk-free-download_GM406889139.pdf
    • http://linens.kiev.ua/images/coin-master-hack-coins_GM406889139.pdf
    • http://linens.kiev.ua/images/coin-master-hack-here_GM406889139.pdf
    • http://linens.kiev.ua/images/minecraft-on-computer-free_GM479516143.pdf
    • http://linens.kiev.ua/images/coin-master-free-spins-1701-20_GM406889139.pdf
    • http://linens.kiev.ua/images/coin-master-free-cards-2021_GM406889139.pdf
    • http://linens.kiev.ua/images/how-can-you-get-free-robux_GM431946152.pdf
    • http://linens.kiev.ua/images/roblox-free-clothes-hack_GM431946152.pdf
    • http://linens.kiev.ua/images/earn-free-robux-today_GM431946152.pdf
    • http://linens.kiev.ua/images/coin-master-free-spin-trick_GM406889139.pdf
    • http://linens.kiev.ua/images/websites-that-give-you-free-robux_GM431946152.pdf
    • http://linens.kiev.ua/images/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdf
    • http://linens.kiev.ua/images/get-free-spins-coin-master_GM406889139.pdf
    • http://linens.kiev.ua/images/free-spins-coin-master-without-survey_GM406889139.pdf
    • http://linens.kiev.ua/images/coin-master-free-spins-23-march-2021_GM406889139.pdf
    • http://linens.kiev.ua/images/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://linens.kiev.ua/images/coin-master-rewards-app_GM406889139.pdf
    • http://linens.kiev.ua/images/free-coin-master-spins-2021_GM406889139.pdf
    • http://linens.kiev.ua/images/robux-generator-no-survey_GM431946152.pdf
    • http://linens.kiev.ua/images/coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f7e.bin
8a50422f14f713192b9901a7b84e7b7e9cff666441e0043618950e4514686813
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F7E 28824 bytes
font_01_sfnt_off000092e8.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
pdf-font-stream PDF embedded font (sfnt) at offset 0x92E8 5696 bytes
font_02_sfnt_off00009ffa.bin
9963ee14ad16be1445bf38b300c138d30991d45f528757aa8dfa8045c3c0fd99
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFA 19312 bytes