Malicious PDF — malware analysis report

Static analysis result for SHA-256 c107fbc8b5e5788f…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 21:32:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fae3bb712783cf623dc4d0c8280266ed SHA-1: b63df6e8843b15a52420efe5c0b3ef04a33be5af SHA-256: c107fbc8b5e5788fe57ab502591124c131fe268cfb7830c1408949120b3b7183
160 Risk Score

Malware Insights

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

The PDF document contains links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' content. The primary URL identified is http://netcdn.tw/app/479516143/minecraft-classic-free-game-hack, which is likely used to lure victims into downloading further malicious content or being redirected to exploit kits. The ML classifier strongly supports the malicious nature of this PDF.

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/479516143/minecraft-classic-free-game-hack In PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/robloxland-free-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-free-diamonds-in-roblox-royale-high-school_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/slurp-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-roblox-gift-card-2021-live_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/install-coin-master_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-blogspot_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/robux-in-1min-hacken_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-in-cheat-ingine_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-robux-for-free-on-pc-2021_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-glitch-for-free-items_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-free-robux-no-waiting_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-hack-codes_GM431946152.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_off0000312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312D 22100 bytes
SHA-256: 322afe59a88c97e11fbdcff2eb2b4cbaa83c034e3a2ed51ff31d1a2a345f5b08
font_01_sfnt_off00006157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6157 17928 bytes
SHA-256: f5ae882fe2605c2402409cd3cb641bc0b4456540121854b01f6cb44cdc09e6e6

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