Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce771cae6b2f9c9f…

MALICIOUS

PDF

35.4 KB Created: 2021-06-18 01:22:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 00b9d365c6168e9afbcf183d18ba801b SHA-1: 23508316acf460d4101dd7d693ab3c511cdfe492 SHA-256: ce771cae6b2f9c9f9c89e409fc0eb108fc06901a398521311e1c79ba0366052e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary redirector identified as 'http://netcdn.co/app/431946152/free-robux-roblox-com-game-hack'. This URL is presented as a lure for 'free Robux' and game hacks, a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, and the heuristic findings confirm the use of a redirector for a game hack lure. No scripts were extracted, but the document's structure and embedded links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-roblox-com-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/claim-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-robux-for-free-no-sighning-in_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/the-cheats-mac-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-tiktok-likes-and-views_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-catalog-things-you-never-knew-existed-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-tampermonkey_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-rocitizen-money-hack-glitch-daily-bonus-patched_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-under-fighters-2-hacked-apk_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000314a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314A 23308 bytes
SHA-256: 19387b47b86960b4f08c1f4ef311f759d2c3550e8e94b1152596c098cf927f33
font_01_sfnt_off000065e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E5 18864 bytes
SHA-256: fda62713e57ce5bda08225043c97239bdf6d28fb2baec4d5a359a2d3db8a497a

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