Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d0de76d6f3a965…

MALICIOUS

PDF

45.2 KB Created: 2021-05-14 15:21:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ed4be9f97120fd38d9d258ba04c75f22 SHA-1: e3047d7e0f61100b6558436873efc193f6c92290 SHA-256: 58d0de76d6f3a965b923cf8f400a00db6f9863645ec999ae72d50556f6edd8e7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also contains an external URI pointing to a suspicious URL, likely intended to download a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/406889139/coin-spin-game-hack
    • http://bildhauerei-roerig.de/images/daily-spins-coin-master_GM406889139.pdf
    • http://bildhauerei-roerig.de/images/how-to-get-free-robux-in-2021_GM431946152.pdf
    • http://bildhauerei-roerig.de/images/free-robux-codes_GM431946152.pdf
    • http://bildhauerei-roerig.de/images/how-can-i-play-minecraft-for-free_GM479516143.pdf
    • http://bildhauerei-roerig.de/images/coin-master-cheat-free_GM406889139.pdf
    • http://bildhauerei-roerig.de/images/free-robux-meme_GM431946152.pdf
    • http://bildhauerei-roerig.de/images/robux-earner_GM431946152.pdf
    • http://bildhauerei-roerig.de/images/bux-gg-robux-free_GM431946152.pdf
    • http://bildhauerei-roerig.de/images/free-limiteds-roblox_GM431946152.pdf
    • http://bildhauerei-roerig.de/images/free-outfits-roblox_GM431946152.pdf
    • http://bildhauerei-roerig.de/images/roblox-tracker_GM431946152.pdf
    • http://bildhauerei-roerig.de/images/coin-master-free-spin-software_GM406889139.pdf
    • http://bildhauerei-roerig.de/images/hack-coin-master-32-mod-apk_GM406889139.pdf
    • http://bildhauerei-roerig.de/images/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdf
    • http://bildhauerei-roerig.de/images/coin-master-cards-hack_GM406889139.pdf
    • http://bildhauerei-roerig.de/images/how-to-get-free-cards-in-coin-master_GM406889139.pdf
    • http://bildhauerei-roerig.de/images/ios-coin-master-hack_GM406889139.pdf
    • http://bildhauerei-roerig.de/images/minecraft-rtx-download-free_GM479516143.pdf
    • http://bildhauerei-roerig.de/images/moon-active-games_GM406889139.pdf
    • http://bildhauerei-roerig.de/images/how-to-change-your-name-in-roblox-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047bb.bin
45e47e6a6964cc7472c1d2b6227157965e4749e6ce1950b1adf8bd4a9efa91fd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47BB 28452 bytes
font_01_sfnt_off0000870e.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x870E 2880 bytes
font_02_sfnt_off000090f9.bin
26961c9f14d61c789be320ef33f793128d7856b3f2b2e22dee8a483f9b6c2997		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90F9 17392 bytes

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