Malicious PDF — malware analysis report

Static analysis result for SHA-256 5929d6b9ea3598e0…

MALICIOUS

PDF

42.0 KB Created: 2021-06-07 07:51:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1e8d8125af04800f5071e71285f1e983 SHA-1: 52c625a26c45083b823fa12b9c50b6fab99a5b41 SHA-256: 5929d6b9ea3598e000475692f55552107e38f033cf66209d5e8f48b18f4330c5
82 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into downloading a file from the provided URL. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URIs further supports a malicious intent. The document's content and embedded links suggest a phishing attempt related to game cheats or free in-game currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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/synapse-roblox-free-2021-game-hack
    • http://felmerihomes.com.au/images/free-account-roblox-with-robux_GM431946152.pdf
    • http://felmerihomes.com.au/images/minecraft-116-1-download_GM479516143.pdf
    • http://felmerihomes.com.au/images/can-you-get-minecraft-for-free_GM479516143.pdf
    • http://felmerihomes.com.au/images/coin-master-event-hack_GM406889139.pdf
    • http://felmerihomes.com.au/images/haktuts-coin-master-hack_GM406889139.pdf
    • http://felmerihomes.com.au/images/how-do-you-get-roblox-for-free_GM431946152.pdf
    • http://felmerihomes.com.au/images/free-robux-cards_GM431946152.pdf
    • http://felmerihomes.com.au/images/roblox-fun-robux_GM431946152.pdf
    • http://felmerihomes.com.au/images/games-that-give-you-free-robux_GM431946152.pdf
    • http://felmerihomes.com.au/images/free-coin-master-glitches_GM406889139.pdf
    • http://felmerihomes.com.au/images/minecraft-bedrock-edition-free_GM479516143.pdf
    • http://felmerihomes.com.au/images/spin-and-coin_GM406889139.pdf
    • http://felmerihomes.com.au/images/free-minecraft-texture-packs_GM479516143.pdf
    • http://felmerihomes.com.au/images/minecraft-free-apk_GM479516143.pdf
    • https://www.roblox.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000045c7.bin
f50e0986b87862f0552aed733dcb274378818229c3172a7e5659e908e5796aad		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45C7 25156 bytes
font_01_sfnt_off00007f9e.bin
1609b18511b731950b3f0e61937f8c461f333fc3cbd02910e186e26e3b855c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9E 18932 bytes

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