Malicious PDF — malware analysis report

Static analysis result for SHA-256 3644db2b3bb7f435…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 06:07:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7243f137cb9f8cba5d8ea9b059b99117 SHA-1: 666e401961c5daba99524ab544af9140174157c6 SHA-256: 3644db2b3bb7f4356e9626bd32c1d5390f4a23830e7318ab8631798d769d871a
62 Risk Score

Malware Insights

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

The document body and extracted URLs indicate a lure for game-related cheats or hacks, specifically for 'Robux'. The presence of an external URI pointing to a suspicious domain, combined with a high ML classifier score, strongly suggests malicious intent. The document likely serves as a phishing lure to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/how-to-get-free-roebucks-game-hack
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-chat-cheats-on-rocitizens_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/makerobux-com-free-robux_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-obc-roblox-accounts-2021_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-on-iphone_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-how-to-make-a-anti-cheat-system_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/comment-avoir-des-robux-gratuitement-no-hack_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-do-you-get-free-robux-instantly_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-minecraft-maps_GM479516143.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-codes-2021_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-speed-run-4-level-29-cheats_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-top-model-cheats_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-free-spin-software_GM406889139.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-to-get-free-minecraft-skins_GM479516143.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-hack-robux-no-human-verification-2021_GM431946152.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/robux-get-com_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003203.bin
1166523f3d09e0d5d766cdeffe77657f02f910549bf48ee3507112ffe2192472		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3203 22200 bytes
font_01_sfnt_off00006359.bin
bb1bb1fad87c9fcb51de89bb7266f179a7458b8a249a047c92f7843a342167cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6359 18944 bytes

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