Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0def44b726bf26…

MALICIOUS

PDF

41.9 KB Created: 2021-05-17 21:08:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: df43c30ba58c38828272abbbf7dc7c51 SHA-1: da998792293be46c0f8d3b0f594175c73414c5af SHA-256: ae0def44b726bf26331cee1127588280a3372de966e2b8d3a7d07505359fa376
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a "doc body" that strongly suggests a lure for downloading game hacks. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, many of which point to game-related cheat files. The ML_NYX_PDF_MALICIOUS firing further supports the malicious classification. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

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/431946152/roblox-adopt-me-hack-game-hack
    • http://bit-sky.com/images/update-coin-master-free-spins_GM406889139.pdf
    • http://bit-sky.com/images/como-hackear-el-juego-coin-master_GM406889139.pdf
    • http://bit-sky.com/images/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdf
    • http://bit-sky.com/images/haktuts-coin-master-hack_GM406889139.pdf
    • http://bit-sky.com/images/free-minecraft-maps_GM479516143.pdf
    • http://bit-sky.com/images/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://bit-sky.com/images/coin-master-free-daily-spins-today_GM406889139.pdf
    • http://bit-sky.com/images/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdf
    • http://bit-sky.com/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdf
    • http://bit-sky.com/images/how-do-i-get-robux-on-roblox_GM431946152.pdf
    • http://bit-sky.com/images/roblox-hack-com_GM431946152.pdf
    • http://bit-sky.com/images/minecraft-hacked-client-112-2_GM479516143.pdf
    • http://bit-sky.com/images/coin-master-online-hack-download_GM406889139.pdf
    • http://bit-sky.com/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://bit-sky.com/images/coin-master-game-hack_GM406889139.pdf
    • http://bit-sky.com/images/free-roblox-usernames-and-passwords_GM431946152.pdf
    • http://bit-sky.com/images/free-online-spins-coin-master_GM406889139.pdf
    • http://bit-sky.com/images/free-roblox-accounts-2021_GM431946152.pdf
    • http://bit-sky.com/images/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdf
    • http://bit-sky.com/images/coin-master-hack-spin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004819.bin
3922a3975bf61d3d9135eb98907334d27c30a53f83923b37908124febec6568d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4819 24520 bytes
font_01_sfnt_off00007f59.bin
4d658ccafa0b893d8d7fed2f8c747f895118d61cffd562c1959dd86f9709654a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F59 18832 bytes

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