Malicious PDF — malware analysis report

Static analysis result for SHA-256 151ab7d66519aef3…

MALICIOUS

PDF

32.9 KB Created: 2021-07-05 18:09:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 015927f191b4276e75c28e732e5479ab SHA-1: 9494297e60641f9cf7b3c686cc3ab6da165f6390 SHA-256: 151ab7d66519aef34dff127c17930ec4db84f6a75ce89f847bdad60b49a60af9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links and embedded text related to game hacks and free in-game currency, specifically targeting popular games like Roblox. The primary malicious URL identified is http://netcdn.tw/app/431946152/robux-in-game-hack, which is likely a redirector to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness, supporting the lure-based attack pattern.

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/robux-in-game-hack PDF link annotation
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-exploit-scripts-free-download_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/robux-for-free-not-fake-by-scammer-kid_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-hack-video_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-hack-dot-top_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-roblox-card-codes-not-used-2021_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-many-hackers-are-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/mistplay-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/cheats-in-roblox-games_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_off00002d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D06 21868 bytes
SHA-256: cb9523d5579b81bfa72945c0fe9a07593502c85ec649bd3851b32af22011e2ec
font_01_sfnt_off00005cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD1 18552 bytes
SHA-256: 0d067593471fd495c76aa0173ccdec3c7a57065eb2f68b568cda202f17f51f7f

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