Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca7a2ed8ef2f14a…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 02:30:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 25e165d684b6335da76becb6cec6a7d8 SHA-1: 99a6d5046c67cbacbcfc0907f4ca91afa922fabc SHA-256: 1ca7a2ed8ef2f14a9b6ec5784e28db3c8e581ea7310eeffe5c92697e21502f25
82 Risk Score

Malware Insights

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

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL, reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence. The overall pattern suggests a phishing attempt to trick users into downloading potentially malicious executables.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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.tw/app/431946152/aimbot-exe-roblox-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/complete-this-obey-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/install-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-hacks-jailbreak-wearedevs_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-weight-lifting-simulator-3-script-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-treasure-hunt-simulator-coin-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-hack-no-human-verification-2021-pc_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-hack-roblox-jailbreak-mac_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-roblox-gratuit_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/b-tools-hack-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-unlimited-spins-apk-download_GM406889139.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_off00002f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F52 22804 bytes
SHA-256: f220d3a791cf13ddb311ae4d02603bc37e28f5553cb15b800586972b90fe4dc2
font_01_sfnt_off000062a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A7 18972 bytes
SHA-256: 843ef4d300b3574587d7d3b0db569cbed6efd3fea6d84b21f9eda658d8fd16fd

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