Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc27d59c137ae14…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 17:33:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 48a0f86802e3def72dffde16fe78801f SHA-1: 2aac5008c6cf4b8c0998ec625a2f9fda97bf2ef6 SHA-256: ffc27d59c137ae14338f252a779c386422ed73de894cc693a8e12f91d25d67a2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux and game hacks, directing users to a malicious redirector at http://netcdn.tw/app/431946152/free-robux-download-game-hack. This infrastructure is known for distributing malware. The document body and heuristics indicate a social engineering tactic to trick users into downloading potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-robux-download-game-hack In PDF document text
    • http://librarystkippgribl.com//repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-website_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/tiktok-free-to-download_GM835599320.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-400-spins-coin-master_GM406889139.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_off00002e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E33 21700 bytes
SHA-256: ff39d16c752ad8f5780883607ea8764c59890a15ab80c80048caa9e1a71e49c8
font_01_sfnt_off00005e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E02 19296 bytes
SHA-256: 5f304289c35a5caca60ae5d5074bee34cff1925eeabd9956883fa8e616b1a204

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