Malicious PDF — malware analysis report

Static analysis result for SHA-256 071f17667e1fa6f6…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 18:11:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1b23ec53a914b1a80fd16c402ae03f51 SHA-1: 04efc79abeaaed27b565c042ca0de0c601d053f4 SHA-256: 071f17667e1fa6f6541f996e2cb5ea36f211bd5c7fd032f82fb7c984e064c83e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generator / game hack' lures for popular games. The primary redirector URL is http://netcdn.tw/app/431946152/robloxheroxyz-free-robux-game-hack, which is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirection chain designed to lead users to potentially harmful content or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/robloxheroxyz-free-robux-game-hack In PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/comment-utiliser-hack-book-one-piece-roblox-quelle-touche_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/want-free-robux-ad_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/pubg-uc-kr-version_GM1330123889.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_off00003307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3307 22648 bytes
SHA-256: 7af2e4458ce03826dffbf0a88b43ecc18fb2919df7b12f2dcf1be8c4ed344d13
font_01_sfnt_off00006573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6573 19220 bytes
SHA-256: 9a75403dc61fcebb8363624a6f582dcc4ac1fd2d4c1d167fae2ecfa95e24b96b

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