Malicious PDF — malware analysis report

Static analysis result for SHA-256 583f10c5273f0929…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 01:55:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e636ef6bd8814716c49b55ab71883d7f SHA-1: 84dd3edb5626837a21e33b93e5b46211b4dcd5df SHA-256: 583f10c5273f09295e3a0d3e312938024b491ec5bc33e406bbbdd1146e7cb1d0
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and text that promote free in-game currency and hacks for popular games like Roblox and Coin Master. The primary URL, http://netcdn.tw/app/431946152/free-robux-app-real-game-hack, is likely a lure to download a malicious application. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests that the document may be part of a multi-stage attack where a password-protected archive is used to conceal the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/free-robux-app-real-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-shirts-template_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-is-being-hacked_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-a-roblox-account-with-forgot-password_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-roblox-games-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-real-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-blank-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30E0 23092 bytes
SHA-256: fd1d83f84a33cd104111299736738717f2548af4827b9e5e038fde480eb2489b
font_01_sfnt_off000064a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A8 18968 bytes
SHA-256: 40e70f9896c1d2dd73ce0a34c726294904c345e0ceccadb112d3bcb1bf7365a7

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