Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68c7323ee466aa6…

MALICIOUS

PDF

36.0 KB Created: 2021-07-04 12:17:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a4acc0dad92c995fe9361f284750c5b4 SHA-1: 2ddc0f2459ef4da37dcbf84bfb3de57ba32bea0a SHA-256: a68c7323ee466aa6e446865a9f8c4a3c4516c062e10aa294d69bd7121cb3ec27
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a primary focus on 'free coin master link' and various game hacks for popular games like Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly suggests this is a lure to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to trick users into downloading potentially malicious content or visiting phishing pages.

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/free-coin-master-link-2021-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/free-interview-in-roblox-studio_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-any-face-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-games-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-yellow-roblox-girl-hair_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/military-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-build-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-do-i-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-money-on-roblox-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/can-oyu-sell-a-roblox-shirt-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hack-pacht_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-codes-for-roblox-lazer-knife-for-twisted-murderer_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-admin-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/intriga-roblox-hack_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
stream_002_off000033f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33F8 23592 bytes
SHA-256: 457268d587b8956480d816b9aad8678fe0ff07c104ac808f6ece2b5e4cef6ef3
font_01_sfnt_off00006909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6909 18568 bytes
SHA-256: e88b6940b40ea5040f81da917e0c9c8aa36dd3f4bad0e71faf6aa4f6d6035265

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