Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4661ccb3777ca54…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 04:03:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b1daeb656851bd203f6059b4e4012a3c SHA-1: 52e6047e54eeb9078d1a881ef46e3162420c6e1e SHA-256: d4661ccb3777ca54b5fa1b4e1aa1c919da926a3bedea0534be20fb2f79e177b6
102 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to direct users to external websites offering game cheats and hacks. The ML classifier and heuristics strongly indicate malicious intent, likely to trick users into downloading malware or visiting malicious sites. The presence of numerous SEO-optimized PDF links suggests a campaign to attract users searching for game exploits.

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/download-hack-mad-city-roblox-game-hack
    • https://new-era.com.tw/image/data/files/cheat-codes-on-assassin-in-roblox_GM431946152.pdf
    • https://new-era.com.tw/image/data/files/gameoffice-net-hack-coin-master_GM406889139.pdf
    • https://new-era.com.tw/image/data/files/roblox-btools-hack-script-2021_GM431946152.pdf
    • http://new-era.com.tw/image/data/files/free-spins-coin-master-twitter_GM406889139.pdf
    • http://new-era.com.tw/image/data/files/how-to-hack-into-peoples-account-roblox_GM431946152.pdf
    • https://new-era.com.tw/image/data/files/free-coin-master-spins-for-today_GM406889139.pdf
    • http://new-era.com.tw/image/data/files/how-do-i-hack-someone-on-roblox-with-edidthiscookie_GM431946152.pdf
    • http://new-era.com.tw/image/data/files/multiplayer-master-hack-coins_GM406889139.pdf
    • http://new-era.com.tw/image/data/files/how-to-get-free-robux-on-roblox-october-2021_GM431946152.pdf
    • http://new-era.com.tw/image/data/files/how-to-hack-denis-roblox-acc_GM431946152.pdf
    • http://new-era.com.tw/image/data/files/free-robux-on-moneysee_GM431946152.pdf
    • http://new-era.com.tw/image/data/files/how-to-play-roblox-for-free_GM431946152.pdf
    • https://new-era.com.tw/image/data/files/coin-master-hack-spins-free_GM406889139.pdf
    • http://new-era.com.tw/image/data/files/coin-master-hack-without-root_GM406889139.pdf
    • https://new-era.com.tw/image/data/files/roblox-gamma-hack_GM431946152.pdf
    • http://new-era.com.tw/image/data/files/get-free-robux-now_GM431946152.pdf
    • https://new-era.com.tw/image/data/files/free-roblox-shirt-templates_GM431946152.pdf
    • http://new-era.com.tw/image/data/files/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • https://new-era.com.tw/image/data/files/robux-earning-websites_GM431946152.pdf
    • https://new-era.com.tw/image/data/files/hacks-arsenal-roblox-tampermonkey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030dd.bin
002add34e872371e19fd2d0d63b9feb7a77ba45a1db8f9db2ff5db937c45a49e
pdf-font-stream PDF embedded font (sfnt) at offset 0x30DD 21968 bytes
font_01_sfnt_off00006169.bin
78b8489d4bbc3d252e8aaeab0f5eea129993aa44e846cf055ac6ca12c619f3d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6169 19576 bytes