Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3cb4e2cf678c92…

MALICIOUS

PDF

34.7 KB Created: 2021-06-27 09:25:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ad483fd6306001b590a514d24008f1d0 SHA-1: cc25e1208c02796345989a67cebcef820b9bba5f SHA-256: 7f3cb4e2cf678c9258ab7457a5f2d605c7c2292d6e65fcf59e263b52c5e8d706
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs that form a link farm, likely intended to direct users to malicious content or phishing sites. The document body and extracted URLs explicitly mention 'Free Robux' and game hacks, indicating a lure to trick users into clicking malicious links. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-no-waiting-game-hack
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-roebucks_GM431946152.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-free-obc-on-roblox-2021_GM431946152.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/mobihack-roblox-hack_GM431946152.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-free-gamepasses-on-roblox-2021-october_GM431946152.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/is-there-actually-a-hack-to-get-fre-robux_GM431946152.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/youtube-yammy-xox-roblox-hacking_GM431946152.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/500-free-coin-master-spins_GM406889139.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-cheat-in-roblox-basewars_GM431946152.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/hacking-clothes-on-roblox_GM431946152.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/robux-hack-club-no-survey-or-download_GM431946152.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/earn-points-for-robux_GM431946152.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/you-cant-get-robux-for-free_GM431946152.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-a-free-minecraft-account_GM479516143.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/roblox-hacker-face_GM431946152.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-hack-online-2021_GM406889139.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003117.bin
c15188f69a2b12284de09bc669a5d46875bae95db434f261174c3aea346fce4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x3117 22128 bytes
font_01_sfnt_off00006232.bin
93633180c3900debb68247fb66e5f1076a7cd506e6a6334a9d121e3d47f7fa2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6232 19136 bytes