Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bfe929f1315ccd…

MALICIOUS

PDF

44.3 KB Created: 2021-06-10 20:58:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 31d6b7b8cc6baf0a4649e3c43332a152 SHA-1: a41d3eab7e5dea50c2a028622a2b8a63dac2d410 SHA-256: d5bfe929f1315ccd5a2a0dd7a7b11fd63b0124f86d3c860e65fd8df0e00ff4e3
160 Risk Score

Malware Insights

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

This PDF document employs a common lure of free game hacks and generators to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts further malicious PDF files. The document's structure and embedded links indicate an attempt to chain redirects, likely leading to a final payload download or phishing page.

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-phantom-forces-dll-hack-download-2021-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-pe-hacks_GM479516143.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_off00004c90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C90 24768 bytes
SHA-256: 4e499a274e1616ad2ccd3faae6d31baa13e73795fd1d934a737073b99327f110
font_01_sfnt_off000085b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B0 19936 bytes
SHA-256: a44ba559010aedc55076524f4bf6ddf005bb9d669f32205741d669d80830b2b5

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