Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc68a13252dd1000…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 05:17:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8d65cdddfd7cee68ac10b92a9769ba8a SHA-1: dcf523408b4293254804f50e1a0887a7c7a19c9f SHA-256: bc68a13252dd100074363dadc6302f2dd8d262523d7df2bcde66e1401b46151e
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a heuristic firing for a game hack redirect lure, indicating a social engineering attempt to trick users into visiting malicious sites. The document body, though partially garbled, contains text related to game hacks and generators, reinforcing the lure. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-hack-apk-online-game-hack.

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/406889139/coin-master-hack-apk-online-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-change-values-without-using-cheat-engine-in-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-for-dont-blink-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/classic-builders-club-roblox-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-users-with-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/best-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-accounts-biz_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/2021-roblox-hacking_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-robux-hack-2021-easy_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_off00003124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3124 22508 bytes
SHA-256: 0e5a62b6c3c9e5fad90f294be56d94fc3d39c2cc3957a97ca86b53f5f4287b87
font_01_sfnt_off00006347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6347 18252 bytes
SHA-256: 7c30a4e131e9e764ff8405716e7b29be65249b2c73aea01c93c83c8586e936fc

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