Malicious PDF — malware analysis report

Static analysis result for SHA-256 60caf3caf6c2b32e…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 06:15:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dc14d66ac3151a44aaf24eaf82a3758e SHA-1: beafe11708f62c083bae0d47926dab11a4e3faa7 SHA-256: 60caf3caf6c2b32ea7a3b54a0f12b2ceacb052d0332ee1d54a76127cf2f95462
160 Risk Score

Malware Insights

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

The PDF contains links to known malicious redirectors and lures users with 'game hack' content, aiming to trick them into downloading further malicious files. The document body and embedded URLs strongly suggest a social engineering tactic to deliver a payload, likely exploiting a PDF vulnerability for execution.

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/406889139/coin-master-free-pin-game-hack In PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-egt-free-items-roblox-email_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-do-you-hack-money-on-roblox_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/robux-hack-me-no-verification_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/v3rmillion-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-download-minecraft-for-free-on-mac_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_002_off00003098.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3098 23048 bytes
SHA-256: 7fb4e181c90d36e5a39e525e19ea024f6021233fd6e5bcd2eea607c1267de339
font_01_sfnt_off00006466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6466 18152 bytes
SHA-256: dc9279c8f9ffb77b5b0b20899b1012281909b59fa7ee038540f0424ab4b7db6e

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