Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1406a82d9e2a40…

MALICIOUS

PDF

42.6 KB Created: 2021-05-11 08:44:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3abd48584248870e37684b857fd9019e SHA-1: aa21bd13121e4c5c1b4d034f4e7e3bea0e592bb1 SHA-256: 1a1406a82d9e2a40d8950f4ec2f90db7c23e63d2a1e3a92cbe94869e8d4e4e33
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with a malicious link. The primary external URI, https://netcdn.xyz/app/431946152/uprobux.com-free-robux-game-hack, is likely intended to lead to a payload download. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/uprobux.com-free-robux-game-hack PDF link annotation
    • http://www.sabbiadoro.net/images/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/hack-a-game_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/roblox-scam_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000476c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x476C 26628 bytes
SHA-256: a005083377065a74c53310757c8862a3c35499b253fbdbce5e9cc970131b665d
font_01_sfnt_off0000830d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830D 18700 bytes
SHA-256: 143ab518bfe1873128e001b27a68cdab9711d8d723564be581f3f50f35f3a2b6

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