Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93ad117992b0d03…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 00:47:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0a1d92922d74e6b823a7fe98d57253e8 SHA-1: 08fe1b3d60b73a87e27c6e1dbb9633b1e243f080 SHA-256: c93ad117992b0d03302f09fb5ed12ed5c755d51389565fb700ee96b5e102f39f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of 'game hacks' and 'free generators' to entice users to click on embedded links. The primary link, http://netcdn.tw/app/406889139/free-spin-coin-master-online-game-hack, likely leads to a malicious download or phishing page. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests that the user might be instructed to decrypt a downloaded file, indicating a multi-stage attack. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to exploit user interest in game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/406889139/free-spin-coin-master-online-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/kids-58-robux-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-download-hacks_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-hacks-new-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robloxia-kid-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-dragon-ball-rage-stats-hack-phezii-br_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-be-headless-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-for-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-generator-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/new-hack-work-100-roblox-deathrun-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-gfx-roblox-maker_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-into-other-peoples-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-money-hack-no-human-verification-works_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hacks-for-minecraft-bedrock_GM479516143.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
stream_002_off000032e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E3 23252 bytes
SHA-256: da74c380bdd8b799b7d837230a34f74f7643905467d0bdde47d0325b115a837c
font_01_sfnt_off00006762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6762 18248 bytes
SHA-256: 718000fc3e7da0c31b23af4d5e60fd4d6a72eced0c4bcd142bf02af8ab821887

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