Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a242788af38959b…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 06:41:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a44688d77b76e6de46f5467fcfe4db0d SHA-1: d681f906ec902ed1df4150ee98a12931d4ff129b SHA-256: 7a242788af38959b6ac7a6bb3d0967637f1803055309fa222b2d4ac806453b07
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document body and embedded URLs indicate a lure for free game items, specifically for Roblox, directing users to download potentially malicious files. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a download button lure further supports a malicious intent. The callback lure heuristic suggests a potential for social engineering tactics to extract further information or payment.

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-roblox-items-game-hack
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/uprobuxcom-free-robux_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-jetpack-simolator-hack_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/shirts-for-roblox-free-shipping_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-free-gold-cards-link_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/collect-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/robux-best_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/everything-free-in-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/tiktok-unlimited-free-trials_GM835599320.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-com-free-play_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-gta-5-hack_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/hacker-music-roblox-id_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/free-robux-hack-generator_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/you-promised-my-son-free-robux_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/minecraft-login-free_GM479516143.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-redeem-code-roblox-2021_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-robux-no-verification-needed_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/como-hackear-coin-master_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-glitches-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003110.bin
2b2d2c5313b149e9f4fc8c2dd8fc757f38f4e5aae5c70541e51c96ed6d0945df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3110 22544 bytes
font_01_sfnt_off00006318.bin
1bbd74c885478b6da8ac526caf82807791560f3be56a03a53783c17cf6598e07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6318 19176 bytes

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