Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49b2ebffdd33f8d…

MALICIOUS

PDF

46.3 KB Created: 2021-06-08 18:24:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bef969c8765754955e1ff3e170e4b53c SHA-1: 2c87aa6245afeb943ec2a9b41806886f8eb5f389 SHA-256: e49b2ebffdd33f8d1c8863218407d755bb2a9f076a3cf93a784cf61372656416
62 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and a document body that suggests a lure for free game-related content, such as 'Roblox' items. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites for download or further exploitation. The heuristic for a 'callback phishing phone lure' also suggests a social engineering component, though the primary attack vector appears to be URL-based redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/game-action-aventure-magic-in-roblox-free-game-hack
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/free-robux-generator-codes_GM431946152.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/minecraft-free-install_GM479516143.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/coin-master-free-coins--spins_GM406889139.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/roblox-verification_GM431946152.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/get-me-free-robux_GM431946152.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/coin-master-rewards_GM406889139.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/free-roblox-passwords_GM431946152.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/coin-master-link_GM406889139.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/robux-claimer_GM431946152.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/master-coin-hack-apk_GM406889139.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/free-robux-com_GM431946152.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/roblox-army-free-robux_GM431946152.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/roblox-hack-me-robux_GM431946152.pdf
    • http://perpustakaan.kedokteran.ump.ac.id/index/repository/free-robux-no-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052d3.bin
f784784f97983e83b6b9b62c5851f5ff45920dd2bd6f6c0e1be48b93eaacda8a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D3 26112 bytes
font_01_sfnt_off00008f16.bin
9c23fe4c4a887a727172793460f5d17d58c77733a93db3aef101a58ea2456bb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F16 19396 bytes

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