Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e4d6698e2fb047…

MALICIOUS

PDF

45.9 KB Created: 2021-06-07 05:01:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8c49688c43fe1214a8ef782278da96fb SHA-1: ee64a5969604addcd9b1a6cdf62fd2dd78657b16 SHA-256: 43e4d6698e2fb047aff6306c4af7ca55bb7beae7e77974b98934ae9d928457db
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, specifically for Roblox and Coin Master, directing users to a URL hosted on netcdn.tw. This URL is identified as a high-risk redirector. The document body and embedded URLs suggest an attempt to trick users into visiting potentially malicious sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the overall pattern indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/how-to-get-free-stuff-on-roblox-catalog-on-ipad-game-hack PDF link annotation
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-free-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-robux-fast-and-easy_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_004_off000052f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F5 25384 bytes
SHA-256: 371613e76867d9c760bbcb1baaf41e39d3e3a990b1e5b5679cdfa3d112273cfc
font_01_sfnt_off00008dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD9 19224 bytes
SHA-256: 9e33341ff1aa25dca5ac4874aeee88a7802f7f86fbfd911dc85b7fad25c7c40c

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