Malicious PDF — malware analysis report

Static analysis result for SHA-256 127dec039cbc3de5…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 16:15:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f283bfc6cb04af0f9c4dba43e64baa57 SHA-1: d16a29436c9a086ada5d49e1595cd27e445bde70 SHA-256: 127dec039cbc3de5fb8baeb7791b59c4b35fbd60615a882ea3f77b785aa0c718
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed as lures for game hacks and free currency, specifically targeting games like Roblox and Coin Master. The primary URL, http://netcdn.tw/app/431946152/how-to-get-free-robux-on-computer-game-hack, is flagged as a redirector for game hacks. The ML classifier strongly indicates maliciousness, and the presence of these lures suggests the document's purpose is to direct users to potentially malicious sites 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/how-to-get-free-robux-on-computer-game-hack PDF link annotation
    • http://uilis.unsyiah.ac.id/ebook/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/carte-de-roblox-hack-gratuit_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-lmao_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-free-hats-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/best-hacker-ever-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/lua-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/hack-750-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/does-roblox-get-hacked_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/money-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-no-download-on-ipad_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_off00002e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E52 22380 bytes
SHA-256: 284d53218ea33173c5dbd60b77f4ab1a3dccd3a82df882a5d429f89753743ab1
font_01_sfnt_off00006018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6018 19420 bytes
SHA-256: 4eeda5a53974dafe6a6a7eb0474e8c00647b290d21ead3df531c01c0ce008c20

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