Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50efc8736a46916…

MALICIOUS

PDF

44.7 KB Created: 2021-06-13 17:52:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5d20504c4b562578e532d96f7caa5b6f SHA-1: 6d5f834b2096403270f75a7a0944f5e776f4d94e SHA-256: c50efc8736a46916f5b6286d285ab662c62d4a10c691d77588e07e526e2054c4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'Roblox Money Hack 2021' and links to a suspicious URL, http://netcdn.co/app/431946152/roblox-money-hack-2021-game-hack. This URL is flagged as a redirector for game hacks, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/roblox-money-hack-2021-game-hack PDF link annotation
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/get-more-robux_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-robux-on-ipad-2021_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/descargar-hacks-para-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.st-peters-alton.staffs.sch.uk/admin/ckfinder/userfiles/files/pokemon-go-free-and-switch-connect_GM1094591345.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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
stream_004_off000052bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52BB 23992 bytes
SHA-256: 675fd9203d5af9faf81a89dc9550bddef119d87d1d15e3686b5a4dc3ad14b10c
font_01_sfnt_off000089d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D9 18960 bytes
SHA-256: ba947e879a6bdace4d31c8f973f4fa0a606953578581dcc4ea22cc9ea28356b3

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