Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf7edb90290e36f…

MALICIOUS

PDF

48.7 KB Created: 2021-06-10 23:03:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c16771810046ff6d44757e4d2350a656 SHA-1: f5ef85d5bccd81c18bfe553593b1b66715f8ad4a SHA-256: 5cf7edb90290e36f75c5e3d88a0c647c257329e94edac9bc90b2e918031434b2
160 Risk Score

Malware Insights

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

The PDF contains a lure related to free in-game currency, directing users to a URL associated with malicious redirector infrastructure. This suggests an attempt to trick users into visiting a potentially harmful site, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of the execution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/como-tener-robux-gratis-en-roblox-2021-enero-nuevo-hack-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-free-gamepasses-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-tiktok-followers-com_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54C9 29876 bytes
SHA-256: 09c6e4232521f609cd2ec5f7c656b13c56a1cf671644b9bb3c25007f6a98022f
font_01_sfnt_off000098b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B6 19324 bytes
SHA-256: 2c7cf889ad50e193526a1d9e22257501c1aed2b200b21a48526420917813eea1

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