Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbc94383d284f0a…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 03:38:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: aa43388012d842f8723688bad9aba1e0 SHA-1: 12869c8841efeb3c16f648c89005ec7d5b6d65c8 SHA-256: 5cbc94383d284f0a9b272e1ba82c8f949e66f6d0694b72f76957935ef9f76b6c
62 Risk Score

Malware Insights

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

The document body and embedded URLs indicate a lure for users seeking in-game currency or hacks for games like Roblox and Coin Master. The primary URL, http://netcdn.tw/app/431946152/how-you-get-robux-game-hack, suggests the user will be directed to download an application. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that this is a phishing or scam attempt.

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-you-get-robux-game-hack
    • http://muslib.unmus.ac.id//repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/gameoffice-net-hack-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/new-free-roblox-hack-rtfsplorer-level-7-explorer-op-hack_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/pokemon-go-free-walk-android_GM1094591345.pdf
    • http://muslib.unmus.ac.id//repository/free-robux-hacker-us_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/best-minecraft-hacks_GM479516143.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-no-vertification-no-survey-no-pasword_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-no-information_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/more-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/roblox-apocalypse-rising-hack-exploit_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-without-verification_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/how-to-get-robux-for-free-2021-without-downloading-apps_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/earnrobux_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/pubg-uc-india-price_GM1330123889.pdf
    • http://muslib.unmus.ac.id/repository/roblox-2021-fly-hacks_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/roblox-app-free-apk_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-roblox-glasses_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/robux-only_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d79.bin
292793bb31b7c2a7fdab88f823d15b9c8d519a3d38b9c80578b3ce224070fc5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D79 22516 bytes
font_01_sfnt_off00005fc6.bin
56fa757f9e5a49b5a9868cb781ce682672aa068df69e370ec5b10dcd658c13b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC6 18984 bytes

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