Malicious PDF — malware analysis report

Static analysis result for SHA-256 85cc01c9711263db…

MALICIOUS

PDF

33.4 KB Created: 2021-07-03 12:50:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d1cbc9a94dca5b8d3809ae635b466444 SHA-1: e630f11e5e6cf5882e6d6602719dbaf8cbec8b63 SHA-256: 85cc01c9711263dbb36f6e2eeb36f45aadfb870fdea141ec25ecfcb4439a8109
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and lures users with promises of game hacks and free in-game currency, directing them to external websites. The primary URL, http://netcdn.tw/app/431946152/roblox-speed-hacks-that-u-can-type-in-chat-game-hack, is flagged as a high-risk redirector. While no scripts were explicitly extracted, the nature of the lures and the embedded URLs suggest a phishing or scam campaign designed to lead users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-speed-hacks-that-u-can-type-in-chat-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-free-hats-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/www-roblox-party-com-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-download-apps_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-official-fan-page_GM406889139.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_off00002b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7E 22120 bytes
SHA-256: 4fea69e77cf2a2b4ad6417fa7d15ee34509cdb8d38241737b4097c5553509b42
font_01_sfnt_off00005ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA0 19456 bytes
SHA-256: 34765ddbb1183544d16d9e2c4dcb8d50e353c754de32d8ecbea742ebfd262170

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