Malicious PDF — malware analysis report

Static analysis result for SHA-256 995f43f3af8fdcd8…

MALICIOUS

PDF

50.0 KB Created: 2021-06-09 09:40:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 786adfc72cf2720492bf1b8c9992f112 SHA-1: 11d6e8ea652f8fdadbf813ea55f822d5ece11c87 SHA-256: 995f43f3af8fdcd8f27027eb08394e25497d08d354d2ed7395bdfe825a1d97e4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with promises of game hacks and free currency, specifically for Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous related URLs strongly suggest a phishing or malware distribution attempt. While no scripts were directly extracted, the nature of the lures and the ML classification indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/roblox-hack-no-human-verification-android-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-working_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-mac_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D5 29716 bytes
SHA-256: 3d26ae8192166c6c559fe84d60ffca78696ff640d2db7d72917d029b62f8e6fe
font_01_sfnt_off000094a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A1 2852 bytes
SHA-256: e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
font_02_sfnt_off00009e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E63 19116 bytes
SHA-256: fe54a12abfc42005f46bcdc1bbdc5543a3748059f32efcd4d5b389891a02cf18

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