Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d87bc6ae00e212…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 12:25:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 604859d2de8ab61ede563e3983b152c6 SHA-1: 40f24dcafb2e274f1a369e862537205cf5c6ccf0 SHA-256: d7d87bc6ae00e21263fc2b5be0aa4825e9995936cc47007bcbe6ed56d2dde1f7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that explicitly promises free Robux and other in-game items, indicating a scam or phishing attempt. The presence of a large number of external links, many with similar 'hack' or 'free' themes, suggests a link farm designed to direct users to potentially malicious or scam websites. No scripts were extracted, but the document's structure and content strongly suggest a social engineering attack.

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.tw/app/431946152/how-to-get-800-robux-for-free-game-hack
    • http://www.repion.com/uploaded_files/userfiles/files/heroes-online-roblox_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-dragon-ball-final-stand-hack_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-spin-codes-coin-master_GM406889139.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-hack-no-human-verification_GM406889139.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-cheat-roblox-dragon-ball-rage_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/play-minecraft-for-free-on-pc_GM479516143.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-online-spins-coin-master_GM406889139.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/cheat-engine-clone-tycoon-2-roblox_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-pokemon-go-accounts-level-30_GM1094591345.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-robux-scam-model_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/fake-hacker-in-roblox_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-spin-today-coin-master_GM406889139.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-com_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/1b-robux-free_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-get-free-items-on-roblox-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003237.bin
054789caec0b16c0e08830927926d185440bd03aa9520c5a52ac02a35256ff87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3237 22124 bytes
font_01_sfnt_off0000632c.bin
be805ca657918939693b450b7256d01abf85ed37ddec4e2d86a9c4404475f57d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 19368 bytes

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