Malicious PDF — malware analysis report

Static analysis result for SHA-256 576d4e32939ed794…

MALICIOUS

PDF

38.9 KB Created: 2021-05-20 17:41:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d0d52e1f9723a269566510ded02e38c4 SHA-1: 6b57887599d332ab443f55490d8a18eb18be0163 SHA-256: 576d4e32939ed794fd3288b6af6e6cf915102e74f8705750eaec497b1818ff61
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA or human verification prompt to trick users into clicking a link. This link, 'https://netcdn.xyz/app/431946152/free-roblox-groups-game-hack', is presented as a way to access a Roblox generator. The document also contains multiple embedded URLs pointing to similar scam-related content, suggesting a phishing or scamming attempt. No scripts were extracted, but the presence of malicious links and the fake CAPTCHA heuristic strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-roblox-groups-game-hack
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-ad_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/legitimate-coin-master-free-spins-apk_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/without-pokemon-go-free-account-2021_GM1094591345.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-make-free-robux_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003353.bin
846343a7d3ade67fe7379a4fc91fb0a44e3fe6d2730d682693f216ef191b4c3e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3353 25084 bytes
font_01_sfnt_off00006cfc.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFC 2832 bytes
font_02_sfnt_off000076ac.bin
59dbfb19f503ab5ccde5afb48b0ebb207c820587c290c946a9c33262b394e3ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AC 18264 bytes

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