Malicious PDF — malware analysis report

Static analysis result for SHA-256 501322feb7325801…

MALICIOUS

PDF

47.9 KB Created: 2021-06-08 14:32:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f2b51b259fa20754947a659496159cb6 SHA-1: d7a9643c71e7c7b0fb3ef413c8f4100d32b1f812 SHA-256: 501322feb7325801a1cb486d082860704af55d24afc87c2ae30820552b0d9b58
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9796

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 https://netcdn.tw/app/431946152/hack-roblox-electric-state-game-hack PDF link annotation
    • http://cornerwebstudio.com/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/roblox-free-hair-girl_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000503e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x503E 25536 bytes
SHA-256: 3344ae73fdcf008662a1671fa5e9fefa45eaa375f9ad9eeee4610d961fe29c01
font_01_sfnt_off00008af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF9 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000980b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x980B 18408 bytes
SHA-256: 779213a4e921766615c34c683dbd2275196eebad93af6a57448601c4316b7bf9

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