Malicious PDF — malware analysis report

Static analysis result for SHA-256 d554286be7b73f51…

MALICIOUS

PDF

33.1 KB Created: 2021-07-03 13:41:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0806ff5c2808c801fd8aafb8d6dd98d4 SHA-1: 84d14d941bf9ec1e0e997213f7703ab19f1e8f63 SHA-256: d554286be7b73f515081eb008afc6fa8e51b9aafd6ed2f3f9a7aa9057936f392
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which are related to game hacks and cheats. The primary URL, http://netcdn.tw/app/479516143/wurst-game-hack, suggests a download lure for potentially malicious software. The heuristic firings confirm the presence of a link farm and a ML classifier strongly indicates maliciousness.

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/479516143/wurst-game-hack
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-everyday_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id//repository/how-to-get-free-robux-2021_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/roblox-twisted-murderer-hack-script_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id//repository/spin-rewards-coin-master_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/se-puede-hackear-nighthawk-imperoum-roblox_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/real-free-spins-for-coin-master_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/mc-update_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id//repository/get-free-robux-no-human-verification_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/roblox-adopt-me-free-vbucks_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-apk-hack-2021_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-roblox-galaxy-makeup_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-no-password_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/roblox-studio-free-online_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/what-is-the-code-for-free-robux_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/roblox-lumber-tycoon-2-infinite-money-hack_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-a-roblox-game-easy_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/roblox-jaubreak-hack-script-auto-rob_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-codes-not-used_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003010.bin
269620622f39483df9a55cda6c7008e60b2ce64792167b2f698b0b4c91ec5cbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3010 21784 bytes
font_01_sfnt_off00005f32.bin
bfe640fece8ec17f9f1aab4c59e3302c849608263b50329376eef2517c23199e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F32 18072 bytes

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