Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f8479c90672791…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 00:10:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 78f3bc3d6ac4b2e7adddcedd1f3553b7 SHA-1: 6cfdc1dc66f2a30b7396084f6efda36fc162462b SHA-256: 07f8479c90672791392c832b22613793d7e1dfe290f1b79befc7d5ff999e78bd
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are related to free Robux or game hacks, indicating a lure for users to visit potentially malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button heuristic further supports a malicious intent. The document likely serves as a phishing or scam document designed to redirect users to compromised or malicious web content.

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/free-robux-discord-servers-game-hack
    • http://lib.akper17.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • http://lib.akper17.ac.id/repository/how-many-levels-does-coin-master-have_GM406889139.pdf
    • http://lib.akper17.ac.id/repository/free-robux-promo-codes_GM431946152.pdf
    • http://lib.akper17.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • http://lib.akper17.ac.id/repository/coin-master-game-hacking_GM406889139.pdf
    • http://lib.akper17.ac.id/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdf
    • http://lib.akper17.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdf
    • http://lib.akper17.ac.id/repository/today-free-spin-coin-master_GM406889139.pdf
    • http://lib.akper17.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdf
    • http://lib.akper17.ac.id/repository/buy-robux-free_GM431946152.pdf
    • http://lib.akper17.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
    • http://lib.akper17.ac.id/repository/coin-master-free-link-today_GM406889139.pdf
    • http://lib.akper17.ac.id/repository/coin-master-hacks-for-iphone_GM406889139.pdf
    • http://lib.akper17.ac.id/repository/how-to-get-free-coins-in-minecraft_GM479516143.pdf
    • http://lib.akper17.ac.id/repository/roblox-for-free-no-signing_GM431946152.pdf
    • http://lib.akper17.ac.id/repository/como-descargar-hack-en-roblox_GM431946152.pdf
    • http://lib.akper17.ac.id/repository/coin-master-free-spain_GM406889139.pdf
    • http://lib.akper17.ac.id/repository/spin-hack-for-coin-master_GM406889139.pdf
    • http://lib.akper17.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdf
    • http://lib.akper17.ac.id/repository/free-money-links-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033a2.bin
528ae91b8026da6dd5909cfc30f55013946b8976baf5733f3c5a9421b5f2d295		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33A2 21640 bytes
font_01_sfnt_off00006307.bin
b115a2c924602d7af6df8e60d1d5a0905588960aaa46bc3f51eeaab49e44319b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6307 19292 bytes

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