Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf7da356807ed2c…

MALICIOUS

PDF

47.9 KB Created: 2021-05-14 15:40:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 633a605fca40634d187ed508e820e33d SHA-1: ae1e09669b6fa3450821361219405a9e48f12a2b SHA-256: fbf7da356807ed2cf328279f9e7cb0e3474ce872c7ed88e81c5c4660f7166df9
82 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating a fake CAPTCHA and embedded URLs, suggesting a social engineering lure. The document body and extracted URLs point towards a scam related to obtaining in-game currency ('Robux') by visiting external sites. No scripts were extracted, but the presence of external links and the fake CAPTCHA heuristic strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/watch-ads-for-robux-game-hack PDF link annotation
    • http://eurosystemssrl.it/images/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/generator-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d91.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D91 26748 bytes
SHA-256: 5d6bd10223221f84e0ce0ce55bcbf421cfa26d3c6adc9860171469fd7a929299
font_01_sfnt_off00008d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D44 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000972f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x972F 18884 bytes
SHA-256: b326a3d2522df63c9b2d79b13b63d757e2bef45666281f059e1577b6e2c17aa3

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