Malicious PDF — malware analysis report

Static analysis result for SHA-256 418a264b007d77f0…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 04:46:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6e0372ded12bc49ea6f9dfbb7dfeb43d SHA-1: b6a6300e254b8b6d496f23a0c980f5efcebab803 SHA-256: 418a264b007d77f0c22f9e03613a09161ada36dea3f67e1ce623be30959edab5
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising a 'game hack'. The heuristic PDF_GAME_HACK_REDIRECT_LURE strongly indicates a social engineering tactic to trick users into visiting a potentially harmful site. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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-card-hack-2021-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/go-to-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-free-account-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/can-pokemon-go-free-promo-codes_GM1094591345.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/cool-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-girl-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/simple-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-generator-com_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
stream_002_off00002f3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F3A 23004 bytes
SHA-256: 951f1024a907a286c090b5303e2af561d989b673cb5f0203a53334ea3a709221
font_01_sfnt_off0000632f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632F 18580 bytes
SHA-256: 47e303c72cd5b62bb17ad4e651525e7015df29692984bfa1ae4c9035b919f2a0

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