Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a7cb1ef2f9724e…

MALICIOUS

PDF

45.0 KB Created: 2021-05-12 14:15:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f2ac1c2c07594bdb490b6afcd22536ec SHA-1: 7b502f8d06b7fa09bf933c6816d6fb6eeb44e8ee SHA-256: 16a7cb1ef2f9724e9f855d93d6afa14e3ef25742f0bc944fbddb629500f98242
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a prominent external URI pointing to sites offering 'free Robux' or game hacks. The presence of a visual download button lure and a callback lure suggests a social engineering attempt to trick users into downloading malicious content or engaging with a scam. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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 https://netcdn.xyz/app/431946152/get-free-robux-com-game-hack
    • http://classicskitours.net/images/inappropriate-roblox_GM431946152.pdf
    • http://classicskitours.net/images/free-robux-glitch_GM431946152.pdf
    • http://classicskitours.net/images/rbx-place-free-robux_GM431946152.pdf
    • http://classicskitours.net/images/coin-hackhub-coin-master_GM406889139.pdf
    • http://classicskitours.net/images/coin-master-2021-free-spins-link-2021_GM406889139.pdf
    • http://classicskitours.net/images/minecraft-switch-free_GM479516143.pdf
    • http://classicskitours.net/images/hackear-coin-master_GM406889139.pdf
    • http://classicskitours.net/images/coin-master-free-spin-redeem-code_GM406889139.pdf
    • http://classicskitours.net/images/coin-master-free-spin-ml_GM406889139.pdf
    • http://classicskitours.net/images/coin-master-deals_GM406889139.pdf
    • http://classicskitours.net/images/coin-master-free-spin-codes_GM406889139.pdf
    • http://classicskitours.net/images/master-free-spin-and-coin-link_GM406889139.pdf
    • http://classicskitours.net/images/today-free-spin-link-for-coin-master_GM406889139.pdf
    • http://classicskitours.net/images/aimbot-download-roblox_GM431946152.pdf
    • http://classicskitours.net/images/free-robux-generator-2021_GM431946152.pdf
    • http://classicskitours.net/images/roblox-free-clothes-girl_GM431946152.pdf
    • http://classicskitours.net/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • http://classicskitours.net/images/free-robux-groups-2021_GM431946152.pdf
    • http://classicskitours.net/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdf
    • http://classicskitours.net/images/coin-master-spin-link-free-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d14.bin
80d8c4bc1bbaf5653d4c3e188d666c065cc5cc7fb6afe1a42f375e28c8d92c04		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D14 28424 bytes
font_01_sfnt_off00008d99.bin
2d8882c6a342abc4889e46f94bfee9f8cbf5538b2f5dc41d172000db9622f481		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D99 18376 bytes

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