Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4f5e29e1de8d13…

MALICIOUS

PDF

46.0 KB Created: 2021-05-19 17:34:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c7775e0b3e223a62524d1705b4fa3964 SHA-1: d17111b31de10308ac4e5b4d69522345a0391645 SHA-256: ad4f5e29e1de8d133fc165a7827e537d3f12e631b0100961d54a8d723f9e9ca7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document contains lures for game rewards and hacks, directing users to external URLs that likely host malicious payloads. The heuristic 'SE_SECRET_RECOVERY_LURE' suggests the document may also attempt to phish for sensitive information like private keys or passwords. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/406889139/coin-master-rewards-2021-game-hack
    • https://www.poc-helmet.com/ckfinder/userfiles/files/www-roblox-com-robux-free_GM431946152.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-rape-hack_GM431946152.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/como-hackear-el-juego-coin-master_GM406889139.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-heaven_GM406889139.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-100-robux_GM431946152.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/clients-minecraft_GM479516143.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-trick-2021_GM406889139.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-to-get-free-spins_GM406889139.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-coins-and-spins-link-for-coin-master_GM406889139.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hacks_GM406889139.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-earn-robux-on-roblox_GM431946152.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-com-2021_GM431946152.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-get-free-robux-for-free_GM431946152.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/master-hack-coin_GM406889139.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-com-hack_GM431946152.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-get-free-robux-website_GM431946152.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-spins-app-for-iphone_GM406889139.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-unlimited-spins_GM406889139.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-cards-and-spin-link_GM406889139.pdf
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-coins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c4b.bin
f23de0e7ab0056b04cad1c7e31472f67c3edc9422fde596590d70daa39df47b5
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C4B 24776 bytes
font_01_sfnt_off000083b3.bin
28810b836843d71500948728ec893d4861d8e8ec34d0bab89a16da208a599db6
pdf-font-stream PDF embedded font (sfnt) at offset 0x83B3 3728 bytes
font_02_sfnt_off000090cd.bin
eeb8f608ee366a70186fb19656f115ef167c42b0d95b456a8493556d529e695c
pdf-font-stream PDF embedded font (sfnt) at offset 0x90CD 18288 bytes