Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7705daf4946c77a…

MALICIOUS

PDF

46.2 KB Created: 2021-05-15 13:06:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a428fdcc920d8d3451a52ce47e045043 SHA-1: 5a1ee18fdf52205a7acc4ef257fb7e246a6eeb55 SHA-256: a7705daf4946c77a1ff81c7da735c5f2ed5b4207404163bc0f95661bc88385cd
82 Risk Score

Malware Insights

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

The sample is a PDF document that displays a fake CAPTCHA or human verification prompt to trick the user into clicking a link. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-25-game-hack, likely leads to a malicious payload download. The document's content and heuristics strongly suggest a social engineering tactic to achieve initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/coin-master-daily-free-spins-25-game-hack PDF link annotation
    • https://www.manmed.info:443/images/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-wurst_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F8 26116 bytes
SHA-256: 9ebed8ffc169d196a7c1df25814d0e124a4ffdaf0dc9ad803555106a07d92dc0
font_01_sfnt_off0000853f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853F 3380 bytes
SHA-256: 1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
font_02_sfnt_off00009127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9127 18568 bytes
SHA-256: b4b281bb5b6dfe092bf3b90adf491610ab408f1d3fe0f6ae1605b441ac4007a5

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