Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fdfcb3c44904392…

MALICIOUS

PDF

34.9 KB Created: 2021-06-25 09:54:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a7acffcaf4eb83b27edf7d111667ea4d SHA-1: 148491390011d51a10d17d0ed6c3d4a8dbaa0129 SHA-256: 1fdfcb3c44904392d82cd7f2e790bad3d491d2e904c8e2cf6345f4246746a937
122 Risk Score

Malware Insights

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

The PDF document contains a high-severity heuristic indicating it's a game hack redirect lure, directing users to a suspicious URL. The document body and embedded URLs reinforce this lure, specifically mentioning 'Roblox Hack' and 'free generator'. The presence of embedded URLs and the nature of the lure suggest an attempt to trick users into downloading a malicious payload or visiting a phishing site, aligning with spearphishing attachment tactics.

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.co/app/431946152/roblox-hack-2021-android-fast-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/roblox-noot-noot-hack-roblox-id_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-person_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/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/earn-free-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-accounts-with-passwords-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-cheat-on-risky-strats-roblox_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-executor-download-for-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-do-you-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/alone-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-punch-animation-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-me-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-inspect_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_off00002f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F77 22448 bytes
SHA-256: cbea7c827c7e6845e1804226040739e698f5338e7a53a2a407c906b87702e051
font_01_sfnt_off0000616e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616E 19620 bytes
SHA-256: c8f7416b8c6d703539990f9aff3910e17fe90f2eeee6a05e8ddebafbe2187f72

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