Malicious PDF — malware analysis report

Static analysis result for SHA-256 50c2312904017c50…

MALICIOUS

PDF

50.9 KB Created: 2021-06-09 07:49:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 243f1b8a4fee17017f69c27680c7b5e2 SHA-1: e2de1ac48400fd0b40ad801b01c9d3b19bf91158 SHA-256: 50c2312904017c50ca0acb3d3c3db7533be5480a625c696b547b53297be8f5a1
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, aiming to trick the user into downloading a "Roblox hack". The document embeds an external URI pointing to a suspicious download URL, and numerous other URLs that appear to be related to game exploits or cheats. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/roblox-hack-download-no-human-verification-game-hack PDF link annotation
    • http://library.yamasi.ac.id/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005167.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5167 37252 bytes
SHA-256: 2d28699d4466f7890f45c4f8bb53482b02f9de8ee1bccdd5017f58bf667e41c1
font_01_sfnt_off0000a15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA15C 19448 bytes
SHA-256: ca9773fd122723b23792be72495ccba97987d92cee9020661c3955eabb3fca4f

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