Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf555c3348feee06…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 21:05:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 05bc7ef57d8572db2f9fe871b2cf908e SHA-1: 630c8f68c8beb4d157723c5898bf2d8ee2d6fb11 SHA-256: cf555c3348feee06dc092637a0f25359583fd8f54744143101849e483c7fc0a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as game hacks or free generators. The primary lure is "free-spin-link-coin-master-today-game-hack" which points to a known malicious redirector. The document's content and embedded URLs strongly suggest a phishing or scam attempt to trick users into visiting malicious sites.

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/free-spin-link-coin-master-today-game-hack In PDF document text
    • https://jas8.com.tw/image/data/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/what-tiktok-free-will_GM835599320.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-get-a-free-lambo-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-survival-games-free_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/synapse-roblox-hack-download-free_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/pokemon-go-free-legendary-pokemon_GM1094591345.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-roblox-stat-changes-discord_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/make-roblox-clothes-free_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_off00003199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3199 22372 bytes
SHA-256: db8268b30be8843e9c08f111c0fe993ae94579c92e6714ad8dba0d5dcc7a1a0e
font_01_sfnt_off00006380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 18696 bytes
SHA-256: 31881190b33b808cb817da8829c891faee4b93e4bfb09ae76d7fe90b75b9481b

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