Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5c285c44843c03…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 08:57:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c0d1aa3a8b6f13a9caca1432fbe337f3 SHA-1: 6ed266588f2ef8d15c8789d037e1a0fca29f52e3 SHA-256: 4c5c285c44843c03642cc32fd6c2c6341b4b089a993d410cf1740c115a2a146a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free in-game currency, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate it's designed to redirect users to potentially harmful content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/406889139/free-coin-link-coin-master-game-hack PDF link annotation
    • http://perpus.wdh.ac.id/repository/roblox-free-vip-gta-5_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/can-roblox-tell-if-you-are-hacking_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/nate-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-items-with-inspect-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/larva-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-level-100-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-hack-2021-sec_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/script-hack-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-obbys-may-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-free-login-and-password_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
stream_002_off00002dae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DAE 22692 bytes
SHA-256: 5f4f2239e17839820f8a9f5b31a65b3201b2eb02f8856420e0d331feef964c17
font_01_sfnt_off00006070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6070 18168 bytes
SHA-256: d6978680c0337f8af4b60576fe648ab9af53f36a416ef1a32498e40032286442

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