Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28774f7a75b9564…

MALICIOUS

PDF

33.4 KB Created: 2021-06-29 17:00:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d20c951eb4d5d935b1835d7c0d0f52e1 SHA-1: b92bef5f9e700541e674649c3b741eb08f08cc16 SHA-256: d28774f7a75b95645e63d2ec4a7d7b470239c6807a393b7d417690e73cf180d1
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to attract users searching for game cheats and free in-game currency. The ML classifier strongly indicated maliciousness, and the presence of a "download button" heuristic further supports a malicious intent to trick users into downloading further payloads. The document body itself contains references to "Roblox Hack Gui Scripts" and multiple URLs, reinforcing the lure.

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/roblox-hack-gui-scripts-game-hack
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-blogspot-free-spins_GM406889139.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-followers-on-tiktok-no-human-verification_GM835599320.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/roblox-hack-app_GM431946152.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/roblox-free-robux-com_GM431946152.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/fb-coin-master_GM406889139.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-spins-coin-master_GM406889139.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-spin-sites-for-coin-master_GM406889139.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-unlimited-coins-for-coin-master_GM406889139.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/marshmello-roblox-t-shirt-free_GM431946152.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-robux-codes-no-human-verification_GM431946152.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-free-in-app-purchases_GM406889139.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/como-ser-hacker-para-hackear-a-personas-en-roblox_GM431946152.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/how-do-u-get-robux_GM431946152.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/robloxheroxyz-free-robux_GM431946152.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/roblox-cheat-engine-patch-bypass_GM431946152.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdf
    • http://moshaver-computer.ir/all_files/ckfinder/userfiles/files/free-roblox-giveawayscom_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f12.bin
c51375b915ec52f58c17ee8eb92c3d32dd8d6a56ba4158084ea490bd0de9e049
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F12 21176 bytes
font_01_sfnt_off00005d07.bin
43f247521451bd20df043dcc20d8463e3b09d8ecd33a02e9e4fa1aace5b2692b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D07 19196 bytes