Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c551bd5c23d7687…

MALICIOUS

PDF

42.3 KB Created: 2021-05-13 01:47:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9c8da724ba528c4d6924ccb1c91ef0c8 SHA-1: 51f320398bce4891acacdcc932118bd4466bc503 SHA-256: 3c551bd5c23d768775fbc3735c913a48e100bafa25174dc02bc06e28bcf44eb6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document displays a fake CAPTCHA or human verification prompt, a common social engineering tactic to trick users into downloading further malicious content. The embedded URL and document body content strongly suggest a lure related to game cheats or hacks, aiming to entice users to click through to a malicious download site. The ML classifier also flagged this PDF as malicious with high confidence.

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/how-to-get-roblox-money-game-hack PDF link annotation
    • http://ptts.pl/images/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/get-me-robux_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/can-u-get-free-robux_GM431946152.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_off000047d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47D7 25184 bytes
SHA-256: e3a23ab0fe62bba4dea400f6d98036090ca4d7fb480c648507f342c4a1c536f9
font_01_sfnt_off00008226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8226 18428 bytes
SHA-256: c447f334fad9b15f432f5aac5fa8081b18071b5b9f1330fc1e6c33f3b8eba776

Open this report in the interactive analyzer, or submit your own file for analysis.