Malicious PDF — malware analysis report

Static analysis result for SHA-256 da34e480422f9628…

MALICIOUS

PDF

44.5 KB Created: 2021-06-11 00:14:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4ca3ebd4588998234e150ad5a7a49a97 SHA-1: 74962540ffcc3856587b25dd3f7bf3d6dae68c6c SHA-256: da34e480422f962883d94749d22340540d7a5eb6cd0d498d5a28996b5897d364
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, likely to lure users into downloading further malware or visiting scam pages. The document body and heuristics indicate a "game hack" or "free currency" lure, a common social engineering tactic. While no scripts were directly extracted, the PDF structure and malicious links suggest an intent to exploit user interest in free in-game items to compromise their systems.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/roblox-obby-that-gives-you-free-robux-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-roblox-prison-life-on-ipad_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/cheat-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-codes_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_off00004eaf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EAF 25592 bytes
SHA-256: f0ba9ae943cb1557b5b8a54f91a36975fa43176dca71ab6654403dbf4a7e3140
font_01_sfnt_off000088bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BD 19160 bytes
SHA-256: e37f60524cdb562efd88ad151637fec47bb1f8ab194f07f0cbb142b5fd2e79bf

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