Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff1f0f0f08df56e…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 20:37:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a69b60398d8d741d12333841f1132a3d SHA-1: a01eb5cb26d2cbad275d0ff6cbdeb97196508b80 SHA-256: dff1f0f0f08df56eca3637d6f07dfd82527d8b4677f9b5e3a4bfa2c93a696933
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to websites offering game hacks and free in-game currency, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of these lures indicates an attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded links suggest it's designed to lead users to a malicious download or exploit.

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/coin-master-free-daily-spins-link-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/how-to-earn-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-password-hacker-no-download_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/body-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/downloadable-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-for-real-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/pubg-uc-key_GM1330123889.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-jailbreak-hack-money-cheat-engine_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-number-for-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-free-shoulder-friend_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-memes_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-cheat-code_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-coins-in-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-on-pc-2021-easy_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-scripts-for-games-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-2021-free_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
stream_002_off00003008.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3008 22796 bytes
SHA-256: 3d5f75369928c86636e6734fa6049e7f5a03b1d4fcd6acdcc8e61760a2423742
font_01_sfnt_off0000633b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 18768 bytes
SHA-256: 0ceb7b0488aaa16a0c23cac8de9df794ae3fa7cd27271b33a51c469a71425e8d

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