Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1665334a2e698ea…

MALICIOUS

PDF

45.5 KB Created: 2021-05-16 19:17:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 38e730ed2986f6d5bb9c463d3841d527 SHA-1: 8ecc695c80949e9c4d68b93b2473e20921a15fd2 SHA-256: c1665334a2e698ea55260f0d3a43afd313e044ba39c20322c54d1e906b00a200
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, a common social engineering tactic to trick users into interacting with malicious content. It also embeds external URIs pointing to potentially malicious sites, such as 'https://netcdn.xyz/app/431946152/free-robux-no-offers-game-hack', which likely serve as download locations for further payloads. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-robux-no-offers-game-hack
    • http://bogatyr.com/images/free-coins-coin-master-2021_GM406889139.pdf
    • http://bogatyr.com/images/coin-master-free-spins-cash_GM406889139.pdf
    • http://bogatyr.com/images/free-spins-for-coin-master_GM406889139.pdf
    • http://bogatyr.com/images/free-robux-app_GM431946152.pdf
    • http://bogatyr.com/images/minecraft-life-hacks_GM479516143.pdf
    • http://bogatyr.com/images/real-free-robux-codes_GM431946152.pdf
    • http://bogatyr.com/images/coin-master-sound-daily-free-spins-link-today_GM406889139.pdf
    • http://bogatyr.com/images/free-robux-videos_GM431946152.pdf
    • http://bogatyr.com/images/best-tricks-co-robux_GM431946152.pdf
    • http://bogatyr.com/images/how-to-get-free-snacks-in-coin-master_GM406889139.pdf
    • http://bogatyr.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://bogatyr.com/images/minecraft-hacked-client_GM479516143.pdf
    • http://bogatyr.com/images/apps-to-hack-coin-master_GM406889139.pdf
    • http://bogatyr.com/images/coin-master-hack-free-spins_GM406889139.pdf
    • http://bogatyr.com/images/free-spins-in-coin-master-without-human-verification_GM406889139.pdf
    • http://bogatyr.com/images/how-do-you-get-free-roebucks_GM431946152.pdf
    • http://bogatyr.com/images/haktuts-free-spins_GM406889139.pdf
    • http://bogatyr.com/images/rewards-roblox_GM431946152.pdf
    • http://bogatyr.com/images/minecraft-menu_GM479516143.pdf
    • http://bogatyr.com/images/coin-master-hack-co_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004987.bin
05322b504441724dc074ba4518f5cc4c4bb779ae15fcc1edd20a98a128be0fd5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4987 25028 bytes
font_01_sfnt_off0000835f.bin
081569ec119746cc4db5e65c324be5d90361ff1f928a16f4e5d08db70348f444		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835F 3944 bytes
font_02_sfnt_off0000904a.bin
db6be32425767485114cb9000642ed63280f0807e0fe45793765b8e181fce2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x904A 18012 bytes

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