Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd230af7e669cbf1…

MALICIOUS

PDF

43.0 KB Created: 2021-06-13 22:11:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 339f05a0156b1d1a482411ef171c8059 SHA-1: 698798bce57ac25cf7dcef2f61a43491dc02cab5 SHA-256: bd230af7e669cbf14d71f7b2aecd1dfbaaec28e109f4e657d0fe04ab368d02e4
122 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks and free currency, presenting a fake CAPTCHA or download button to trick the user into clicking a malicious URL. The embedded URL `http://netcdn.co/app/431946152/chatsfor-roblox-for-free-rubux-game-hack` is the primary indicator of malicious intent, likely leading to a second-stage download or exploit. No scripts were extracted from this sample, but the document structure and embedded links strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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 http://netcdn.co/app/431946152/chatsfor-roblox-for-free-rubux-game-hack PDF link annotation
    • http://internetdeputy.com/images/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://internetdeputy.com/images/redeem-robux-card-free_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/roblox-face-err-free_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/pubg-uc-iraq_GM1330123889.pdfIn PDF document text
    • http://internetdeputy.com/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/dumptruck-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/how-to-hack-roblox-passwords-2021_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-roblox-shirt-templates_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
font_00_sfnt_off00004841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4841 25936 bytes
SHA-256: 354f36129d38711eb8d33e209112ff19e97c7bcc637471826d7ba9bb742e1090
font_01_sfnt_off000084c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C4 18584 bytes
SHA-256: 7cb29bde2ce0f750b5ee16ae84fa3d7c298f67fbc8141b4104dd6b1618a4b59a

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