Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c9b4d91603b864…

MALICIOUS

PDF

40.8 KB Created: 2021-04-22 22:27:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b78f4b632358fdd2151b63aed26cec4b SHA-1: cd99f4ce45d471d1e8c41fd7be3f80baf2fa5a90 SHA-256: 53c9b4d91603b864288f8cbbefef1794adf6f730084ae7e079409edff8f16ea2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to websites offering game hacks and cheats, a common lure for malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports a malicious intent to direct users to potentially harmful sites. No scripts were extracted, but the document's structure and embedded links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://netsecure.pro/app/431946152/barren-cheats-roblox-game-hack PDF link annotation
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-red-shirt-free.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-assassin-hacks-2021.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-grouos.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-roblox-exploits-that-are-safe-v3rmillion.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-free-h-robux.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-roblox-items-on-catalog.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-candy-van-script-roblox-pastebin.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-on-roblox-2021-december.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/red-boy-v2-jailbreak-roblox-hack.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/google-play-free-robux.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
stream_003_off000043b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43B0 25812 bytes
SHA-256: 61eed248700d76d0dc1a0eacc96326f5d2a5d9543f6e9eafed52c7374965078c
font_01_sfnt_off00007dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC3 18280 bytes
SHA-256: 00f6e87a03e83735d251aad915c110f41e48ada9135b48f9b0fd5e9735c23c44

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