Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a21e863c9ac5fe…

MALICIOUS

PDF

34.8 KB Created: 2021-06-29 09:14:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4aea113bf3561ffe19dd7cbb5644f2ab SHA-1: 15168e2cb8be6a309928146b75ad8c869f437a97 SHA-256: f8a21e863c9ac5fe92263fb3bea58183248ec9a57b722e169f027a63db9e239e
82 Risk Score

Malware Insights

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

The document body and embedded URLs suggest a lure for free in-game currency or items, likely leading to a malicious download. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates a common tactic to bypass security filters by encrypting the payload. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/join-my-group-for-free-robux-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id/repository/roblox-account-hacke_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-the-prankster-face-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-generator-no-quiz_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/is-tiktok-pro-free_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/como-tener-robux-gratis-sin-hacks_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-hack-nopde-engine-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-robux-hack-jailbreak-ios_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-that-only-needs-your-password-totally_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-hack-2021-windows-10_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/hack-welcome-to-farm-town-beta-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-robux-no-hack-or-cheat-2021_GM431946152.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
font_00_sfnt_off00002f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1A 22508 bytes
SHA-256: e652ad79553daeb0a8fc102ad65dfc40716dae5971641548077410d12f3a1e3c
font_01_sfnt_off00006182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6182 19552 bytes
SHA-256: e446b4a4394a194caae4ec2219f4c5198952270bfe070133ba98b927ebec8da9

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