Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1a29f98c117f6c…

MALICIOUS

PDF

30.4 KB Created: 2021-07-19 12:23:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bb43932cae0405dac82628c3dcb8bbce SHA-1: a13e1c8640f4becc29f6a229b87128dd4ac2605c SHA-256: 6a1a29f98c117f6ce0c692a9776af70ab48eca49c0d852251b80348c4dd1c301
82 Risk Score

Malware Insights

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

The sample is a PDF document that displays a fake CAPTCHA or human verification prompt to trick users into downloading software. It contains multiple embedded URLs, including one pointing to a 'minecraft-launcher-free-game-hack', suggesting a lure for potentially unwanted or malicious applications. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 http://netcdn.tw/app/479516143/minecraft-launcher-free-game-hack
    • https://skbm.ba/kardio/files/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • https://skbm.ba/kardio/files/files/free-minecraft-survival-server_GM479516143.pdf
    • https://skbm.ba/kardio/files/files/roblox-script-hack_GM431946152.pdf
    • https://skbm.ba/kardio/files/files/earn-free-robux-on-roblox_GM431946152.pdf
    • https://skbm.ba/kardio/files/files/free-tiktok-views_GM835599320.pdf
    • https://skbm.ba/kardio/files/files/coin-master-free-spins-promo-code_GM406889139.pdf
    • https://skbm.ba/kardio/files/files/play-minecraft-online-free_GM479516143.pdf
    • https://skbm.ba/kardio/files/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdf
    • https://skbm.ba/kardio/files/files/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002786.bin
d2dec4fa9deda91f3d9ba82c1520a065425cff0c0d1a4807a44ed7f8d9aa8a14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2786 21472 bytes
font_01_sfnt_off00005650.bin
d837b145e961d25029e35f3a46fce907c35d402980f977a4958a38d6468d5501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5650 17872 bytes

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