Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c1c0eecc31d5b2…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 13:45:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 552194a592342b75611b0c66631d954d SHA-1: 96d41674dea8fbf64bf01e4d1a512bda52ccb686 SHA-256: 01c1c0eecc31d5b2910ae758f295aec7c6a8b3ff9437115d5f4022d87261a7c4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL, reinforcing the lure. While no scripts were extracted, the PDF structure and embedded URI strongly suggest a phishing attempt to redirect users to a malicious site, likely for credential harvesting or malware delivery.

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/431946152/roblox-shirt-template-free-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-bloxburg-free-bs_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/weight-lifting-simulator-2-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/fnaf-roblox-fread-bear_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-catalog-free-clothes_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-tik-tok-quiz_GM835599320.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/ap-get-free-robux-and-tips-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/android-fast-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-download-free-ios_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/can-you-make-a-minecraft-server-for-free_GM479516143.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_off000032bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32BF 22240 bytes
SHA-256: 1f28d26dbbbdf3e144ee074f12579d221e32316c97b2ec06d1b4639e347e4c09
font_01_sfnt_off00006446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6446 19476 bytes
SHA-256: 39f31297814331a53f6b553485ee4f398b4780561fca342eeeaa3a41f125c1d6

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