Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac34aad632953f6e…

MALICIOUS

PDF

42.0 KB Created: 2021-05-12 20:37:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3575c70775cc1bb509dba15eded155f8 SHA-1: 113345cfef58d4b825689cf9a9e3aa13153ecb2e SHA-256: ac34aad632953f6ec366372af15672863bb43ab442e9b53f2d9592c99744cb5e
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into clicking a link, which is a common social engineering tactic. The embedded URLs and document body content suggest a lure related to game cheats or in-game currency. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being a malicious document designed to lead the user to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/how-to-earn-free-spin-in-coin-master-game-hack
    • http://stiepariperpus.web.id/sarjana//repository/roblox-fly-hack_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/free-coin-spin-daily-link-net_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/free-minecraft-capes_GM479516143.pdf
    • http://stiepariperpus.web.id/sarjana//repository/50-free-spins-coin-master_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/robux-prices_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/master-free-spin-and-coin-link_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/roblox-weird_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-hacks-no-downloading_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-hack-tool-pc_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-no-download_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-pe-apk-download_GM479516143.pdf
    • http://stiepariperpus.web.id/sarjana//repository/roblox-rewards_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/regal-world-coin-master_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/how-do-you-get-free-robux-2021_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-gifts_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a94.bin
6c529406f2a5a7eeb871c9fa7da9ee9cc8219e0cd071e551442a2abab3125535		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A94 24416 bytes
font_01_sfnt_off000082a5.bin
c8469be4e135a939fdcd4d5c4316a8d7a284a9925859706409da67ce72f50dba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82A5 18052 bytes

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