Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf3716731bafc12…

MALICIOUS

PDF

42.6 KB Created: 2021-05-11 23:35:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 744f2e24021a6006ba0ab18e936f2adb SHA-1: f23a7aeffd9ed7e8d9c0b86e46ba2a46e67ee428 SHA-256: 6cf3716731bafc1265642d2f6518a225fbee65d1b59004c5ae47be7d141d86a3
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which appear to be part of a link farm designed to attract users with lures like 'Flip Master Free Coins'. The presence of numerous PDF links and a high ML classifier score strongly suggests malicious intent. The document likely serves as a lure to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/flip-master-free-coins-game-hack
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-app_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-cheat-codes-free_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-apk-free-download_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-free-coins_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-blog_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-2021_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-free-spin-sites_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-server-hack_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/androeed-ru-minecraft_GM479516143.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/new-free-spins-coin-master_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/roblox-sexually_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/no-human-verification-coin-master-hack_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-app_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/get-robux_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/uprobuxcom-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aa9.bin
d2aa46a26ce7475c2a83fba21e1030a39d7a01cc78e09173e4b31597a6b1713d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA9 25280 bytes
font_01_sfnt_off0000853a.bin
3450ed1afe7ce5e19b58975657b760669c0945b44f2c0e2bf4733bd3b79b592d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x853A 17960 bytes

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