Malicious PDF — malware analysis report

Static analysis result for SHA-256 1baff28d93bbf02f…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 02:16:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4cb17d0b5444aa77d9031e7eaa273613 SHA-1: d768e535e9d3168277e776b1aaecec16ddbc374d SHA-256: 1baff28d93bbf02fb60ceebcdbd881769076b7f82a70714f39222eedc8bd7e68
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a 'game hack' which redirects to a malicious URL. This suggests the document is intended to trick users into downloading or executing a payload, likely malware. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent to exploit user interest in game cheats.

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/hack-coin-master-apk-358-game-hack PDF link annotation
    • https://ezgolfer.com.tw/image/data/files/cheat-engine-with-roblox_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-spin-link_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/dominous-roblox-hack_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/destruction-simulator-codes-roblox-hack-para_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/is-there-a-real-way-to-earn-robux-for-free_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-best-anticheat_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/vip-roblox-hack_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_off00002e95.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E95 22648 bytes
SHA-256: cef393adf9ed147e0427a3275269cadb2c592a56e8f0590ae183f09d059fcdda
font_01_sfnt_off0000616b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616B 18696 bytes
SHA-256: c627d1d626f2c96a0d5ced4df9cdbc4578256281fc818842ecc62acaf097b54d

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