Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39b997cf12e3396…

MALICIOUS

PDF

34.2 KB Created: 2021-07-09 18:29:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0398b80db9d8ea1ef04d32ba48cb5c30 SHA-1: 97fd45d813a78c6d2efbaee979d82a4207b646b9 SHA-256: d39b997cf12e339699177c55559420283e31bfc6c87c528640e0b7f64c965cf8
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are related to game hacks and cheats, suggesting a lure for users to download malicious content. The presence of a direct download URL and a high ML classifier score further indicate malicious intent. The document's structure and content align with a phishing or social engineering attack aimed at tricking users into executing further malicious payloads.

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/406889139/fbchampion-game-hack
    • https://sunnygarden.com.tw/image/data/files/free-spins-coins-coin-master_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-online-free-spin_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-account-stealing-hack-pastebin_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-how-to-get-free-items_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/free-games-coin-master_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robux-gift-card-codes-2021_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-how-to-get-paid-games-for-free_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-robux-codes-2021_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/completed-coin-master-hack_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/blox-supply-free-robux_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-rpg-world-hack-script_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/minecraft-wurst_GM479516143.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robux-pin-codes_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/minecraft-pe-hack-client_GM479516143.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdf
    • https://sunnygarden.com.tw/image/data/files/todays-free-spin-and-coin-links_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/hackear-coin-master-espaol_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-free-robux-deutsch-pc_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-promo-codes-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003090.bin
e6ec44d183e65dd80efaa297df66cae221d3d630711782ef14a205d95941eb41
pdf-font-stream PDF embedded font (sfnt) at offset 0x3090 22400 bytes
font_01_sfnt_off00006255.bin
fb679c9250522cab0344be15c9898f12ed930a7de6dfe2591d59bad5f2ca43f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6255 18656 bytes