Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8bea34feb98be0…

MALICIOUS

PDF

48.1 KB Created: 2021-06-11 01:45:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 72a3c3c00c75351259210730ca405d99 SHA-1: 1344b979fc5135afec38b8c92b4ed141e5a730a5 SHA-256: 5b8bea34feb98be08a0edcb00f720a517648e2e7c42ec5e782a6c5bef6a980a9
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that promise game hacks and free in-game currency, a common lure for malicious content. The heuristic 'SE_FAKE_CAPTCHA' indicates the document likely displays a fake verification prompt to trick users into interacting further. The embedded URLs, such as 'https://netcdn.tw/app/431946152/free-naruto-shirt-roblox-game-hack' and the IP-based URL 'http://110.232.83.89/slimsppks/repository/admin-commands-hack-roblox-script-pastebin_GM431946152.pdf', are strong indicators of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/free-naruto-shirt-roblox-game-hack PDF link annotation
    • http://110.232.83.89/slimsppks/repository/admin-commands-hack-roblox-script-pastebin_GM431946152.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/add-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/pokemon-go-joystick-free-download_GM1094591345.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-roblox-account-information_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-facebook-hack_GM406889139.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_off000051f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51F7 24984 bytes
SHA-256: a33ec4726649fbcbeb9fc6c2497b24625b18e5e326f77046fefc3b9854eac9be
font_01_sfnt_off00008b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4F 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000097f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97F7 18708 bytes
SHA-256: 3fa15527c982d766e22324793af336c42b26ec94f97baf101c97ad65f23ec1e0