Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa540e42ba2d2520…

MALICIOUS

PDF

45.2 KB Created: 2021-06-02 08:37:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 712c952e70eda7e52c8c5d19398ee091 SHA-1: 0326199b70316e56af3bfcbc62d786920fdf8b99 SHA-256: aa540e42ba2d2520fab3f568a24fd5ad967567f5c4344e22aa5f9c7e2da08ceb
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a heuristic firing for external URIs, indicating an attempt to redirect users to external content. The document body, though partially corrupted, suggests a lure related to game cheats and hacks. The presence of multiple URLs hosted on similar domains reinforces the likelihood of a malicious download or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.xyz/app/431946152/cheats-to-say-phone-in-roblox-game-hack
    • https://7gking.tw/upload/files/free-coins-coin-master_GM406889139.pdf
    • https://7gking.tw/upload/files/coin-master-hack-september-2021_GM406889139.pdf
    • https://7gking.tw/upload/files/roblox-pics_GM431946152.pdf
    • https://7gking.tw/upload/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://7gking.tw/upload/files/roblox-hack-codes_GM431946152.pdf
    • https://7gking.tw/upload/files/minecraft-jar-free_GM479516143.pdf
    • https://7gking.tw/upload/files/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • https://7gking.tw/upload/files/minecraft-free-ios-2021_GM479516143.pdf
    • https://7gking.tw/upload/files/coin-master-golden-card-hack_GM406889139.pdf
    • https://7gking.tw/upload/files/coin-master-free-spins-cheat_GM406889139.pdf
    • https://7gking.tw/upload/files/roblox-piano-hack_GM431946152.pdf
    • https://7gking.tw/upload/files/best-free-minecraft-hacked-client_GM479516143.pdf
    • https://7gking.tw/upload/files/who-to-get-free-robux_GM431946152.pdf
    • https://7gking.tw/upload/files/free-robux-link_GM431946152.pdf
    • https://7gking.tw/upload/files/free-private-minecraft-server_GM479516143.pdf
    • https://7gking.tw/upload/files/free-spins-for-coin-master-game_GM406889139.pdf
    • https://7gking.tw/upload/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • https://7gking.tw/upload/files/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • https://7gking.tw/upload/files/roblox-verification_GM431946152.pdf
    • https://7gking.tw/upload/files/mcpe-hack-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005280.bin
7a2928b83ee08a5a6cc88db43fff303e9c15b5a6964abbb1e49a482c733299f1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5280 25240 bytes
font_01_sfnt_off00008ce3.bin
efa9c600d3072dc96fd16d86a63ffedacfa5d9711e17223b24b20d55d9f0cfc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE3 18616 bytes

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