Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d5bd47e2466892…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 15:57:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6c24b9f78c43d9f64f135adb5f1c2a2a SHA-1: acbb6b32002d4935929e4018d4287a3467d542f8 SHA-256: 82d5bd47e2466892e73188f3146ea3fc081e681d7a963bc85de01fa526c276c4
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into downloading a malicious file, likely related to game hacks. The embedded URL and numerous other URLs point to sites offering such cheats, suggesting a social engineering lure. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-phantom-forces-hack-unlock-all-game-hack PDF link annotation
    • http://perpustakaan.fk.unila.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/roblox-robux-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fk.unila.ac.id/repository/play-minecraft-for-free-on-pc_GM479516143.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_004_off000051dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DC 24768 bytes
SHA-256: 2814de5eb57894969a158c38955251d31ac7058b06a967e70011fa51a8614b09
font_01_sfnt_off00008b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1A 19216 bytes
SHA-256: 0885c90472a274821e776ab4b5f38f135c1d995b5730343accc291586d18f099

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