Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f36059c50abb4c6…

MALICIOUS

PDF

48.2 KB Created: 2021-06-03 14:32:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 38467646c8f17773fe603c31f35c9670 SHA-1: 2af0f400da7fc1f8d660552ad755e85e00727ab7 SHA-256: 1f36059c50abb4c66c1bf7ed63dd072763cf87a13ba695175ea75b4acbf6b03b
62 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a document body that explicitly promises free Robux, a virtual currency for the Roblox game, to entice users. The presence of multiple links to external resources, including one directly leading to a file named 'get-me-free-robux-game-hack', strongly suggests a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.online/app/431946152/get-me-free-robux-game-hack
    • http://oca.undil.tl/repository/to-get-free-robux_GM431946152.pdf
    • http://oca.undil.tl/repository/minecraft-modded-client_GM479516143.pdf
    • http://oca.undil.tl/repository/coin-master-free-spins-2021-ios_GM406889139.pdf
    • http://oca.undil.tl/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://oca.undil.tl/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • http://oca.undil.tl/repository/roblox-piano-hack_GM431946152.pdf
    • http://oca.undil.tl/repository/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://oca.undil.tl/repository/roblox-rape_GM431946152.pdf
    • http://oca.undil.tl/repository/free-robux-no-generator_GM431946152.pdf
    • http://oca.undil.tl/repository/free-robux-without-verification-2021_GM431946152.pdf
    • http://oca.undil.tl/repository/free-robux-by-watching-ads_GM431946152.pdf
    • http://oca.undil.tl/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • http://oca.undil.tl/repository/free-robux-on-phone_GM431946152.pdf
    • http://oca.undil.tl/repository/roblox-free-clothes-hack_GM431946152.pdf
    • http://oca.undil.tl/repository/i-want-free-robux_GM431946152.pdf
    • http://oca.undil.tl/repository/robux-free-gift-card_GM431946152.pdf
    • http://oca.undil.tl/repository/hack-game-coin-master_GM406889139.pdf
    • http://oca.undil.tl/repository/coin-master-free-link-facebook_GM406889139.pdf
    • http://oca.undil.tl/repository/roblox-robux-hack-generator_GM431946152.pdf
    • http://oca.undil.tl/repository/25-free-spins-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005201.bin
384f929e1fc8d4306631493309032053b3a0370381d7e9c56392a29289c83949		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5201 31516 bytes
font_01_sfnt_off00009a1d.bin
e3f176f8735a7a9c211288ec5f3dfc0a25536bb398bd4870e4b297ba4f960079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A1D 18312 bytes

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