Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a88208a5a5deb0…

MALICIOUS

PDF

45.4 KB Created: 2021-06-11 00:17:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e1a94ca516f451d05fcc352942cc6333 SHA-1: 7bda7ea71d3ee69d97a07f218c713e6ae27cf9ce SHA-256: c0a88208a5a5deb072c7e497794ca7bfd9fb728d1fd731fcd762c8a65e169a57
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick the user into interacting with the document. It also embeds multiple URLs, one of which is directly referenced in the document body, suggesting an attempt to redirect the user to a malicious site for further payload delivery or exploitation. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/ariana-grande-break-free-roblox-music-id-game-hack
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-without-human-verification-real_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/robuxfree-con_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/get-free-spins-in-coin-master_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-daily-spins-2021_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/robux-hack-working-2021_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-roblox-intros_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-minecraft-coloring-pages_GM479516143.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/give-me-robux_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/hack-to-get-money-on-roblox-rocitizens_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/robux-hack-no-human-verification_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-spin-and-daily-news-coin-master_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-hack-with-facebook-login_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-spins-coin-master-2021_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-cheat-codes-free_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-gold-cards-hack_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spins-2021-today_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-real_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-claim-spins_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-hack-roblox-games-no-downloads-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005048.bin
f598cf4e11115162c6e298189097a04b0511994de770eafb71d00671b9546b5c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5048 25504 bytes
font_01_sfnt_off00008c03.bin
e03a0c55e01580203318fefa3580a4b4264790793fa5dcbec8178369630a730a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C03 19296 bytes

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