Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc391d0fad55b6cf…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 07:21:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cc77d938678f07356596376d292da9fb SHA-1: 6b6bee5d659977fb94e23735cf240dcd8f818bf1 SHA-256: dc391d0fad55b6cf6f0adaa64640f948ef51f52a8f742ecd381c1661bd66f1b5
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into downloading a payload from the external URL. The ML classifier also flagged this PDF as malicious with high confidence. The presence of embedded URLs and the document's deceptive content strongly suggest a phishing or social engineering attack aimed at delivering malware.

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.online/app/431946152/roblox-robux-hack-game-hack
    • https://amozeshportal.ir/assets/uploads/pages/files/haktuts-coin-master-free-spins-2021_GM406889139.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-free-robux-no-verification_GM431946152.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-free-spins_GM406889139.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/free-coin-coin-master_GM406889139.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/minecraft-free-computer-game_GM479516143.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/free-roblox-money_GM431946152.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/minecraft-bedrock-hacks_GM479516143.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-free-spins-link-2021-blogger_GM406889139.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/collect-robux_GM431946152.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/hack-tiktok-fans-free_GM835599320.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/claimrobux-net_GM431946152.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/minecraft-java-edition-code-free_GM479516143.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/roblox-rape-hack_GM431946152.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/master-coin-master-free-spin_GM406889139.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/free-roblox-card-codes_GM431946152.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/funbloxxyz-free-robux_GM431946152.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-free-skins-in-minecraft_GM479516143.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/free-robux-promo-codes-2021_GM431946152.pdf
    • https://amozeshportal.ir/assets/uploads/pages/files/free-minecraft-server-hosting-24-7_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f73.bin
23c5391b335cc6dced4620e9c3b11e863ca8673cb5965cc4d5e61dbed104833a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F73 27132 bytes
font_01_sfnt_off00008ecf.bin
fa424f86a9ddd472d540fc30f07119be4b576a9306b5f7bb82c207f2bb92a2b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECF 18320 bytes