Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff5c6a8866bfbef…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 01:38:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: df10a900578745c6e79ccab574c223f1 SHA-1: 40d71b9ed84f9a78c3e69f6e1008623b960778e9 SHA-256: 6ff5c6a8866bfbef52c7b885bbff8a2ead77dfd8c3085adbdce775b9722d1cf6
82 Risk Score

Malware Insights

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

The PDF document uses a lure related to game hacks and free downloads, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. The primary IOC is the URL which likely leads to a payload download or further redirection.

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.tw/app/479516143/minecraft-free-download-unblocked-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/tiktok-free-bot_GM835599320.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/wierd-roblox-items-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-tiktok-followers-quora_GM835599320.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-client-roblox-may-2021-asshurt_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-for-pf-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/buy-robux-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-fre-robux-2021-novmber_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-hack-for-roblox-that-works_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-items-that-hack-your-game_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-hack-not-patched_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-no-joke_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/freerobuxhack-us-2021_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_off0000323e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323E 22236 bytes
SHA-256: 3f853c6ada7fc349b36f38bc5e422505270ce623ddb7cb6e5fc154ce6fbcff71
font_01_sfnt_off0000636e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636E 19092 bytes
SHA-256: b89de8ec978c760e16c728bf26098254cc88868f8675788ef266acc2a2d3d026

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