Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27d95f6d71f3c6b…

MALICIOUS

PDF

33.7 KB Created: 2021-06-18 21:58:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 81c07b2219360af54c089e4e118b5680 SHA-1: e5470eb95ddf7533dfdf9916900e0bb014f0d213 SHA-256: c27d95f6d71f3c6bf27f65f9fb821e9de2bf7433157b85bd8aa7c04e034d81e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly flagged this PDF as malicious. The document body and embedded URLs advertise game hacks and free items, a common lure for phishing or malware distribution. The presence of external URIs suggests an attempt to redirect the user to a malicious site for further exploitation.

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.co/app/431946152/best-free-items-on-roblox-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-online-photoshop-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/cool-roblox-high-school-cheats_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-robux-for-free-grantz_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-limited-edition_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-cheats-to-get-2021-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/create-your-own-avatar-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/easy-how-to-get-free-robux_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
font_00_sfnt_off00002e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E62 21964 bytes
SHA-256: 43339cfe76fc56ed5a94d1e0ace549f2063cd0335e416325c554690c35096554
font_01_sfnt_off00005ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE0 19016 bytes
SHA-256: 4c7d53d721ccc34e9b242b6b436b8752825435b1bfd996329f50b94b0f4a15f3

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