Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d19a1e5ae0248e…

MALICIOUS

PDF

42.2 KB Created: 2021-04-28 05:01:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 709076dad3033c07ca82169dac6855c5 SHA-1: f337c257c96626eb8856c6514418bc466b633626 SHA-256: b9d19a1e5ae0248e18fc0887145b204a29cc55e6b43ce36aa0fec355ffe4eea7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/dinosaur-simulator-roblox-hacks-game-hack PDF link annotation
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/april-1-roblox-hack.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/vechlie-simulator-for-free-roblox.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/hack-de-atravesar-paredes-roblox.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/are-robux-hack-legit-forums.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/safe-free-robux-no-password-or-human-verification.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-no-generator-2021.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/cheat-engine-roblox-crash.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/como-hackear-cuentas-de-roblox.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-hack-acc-in-roblox-kazok.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-roblox-account-generatorold-account-spiiltz-rico.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_off0000434d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x434D 26752 bytes
SHA-256: 2fa9cb90b26a85ea0ee302d00f1032408cb04e056faa9d41cde0c3a5f5af7c4e
font_01_sfnt_off0000812b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x812B 18972 bytes
SHA-256: fa02ea3e204ce776b38d95c1b8beb207922910725a60a7e1a398f61400750d2a

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