Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a9a65f8f6fbe48…

MALICIOUS

PDF

48.7 KB Created: 2021-05-17 09:59:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c95c8ea421ca83adf7d4bb5e55cc7278 SHA-1: dcabe3736dfe2162d96a4285d0b003c0da568cf9 SHA-256: 99a9a65f8f6fbe48ec04b2f6db0c83bd95951a009d4d27e29ecf4feda4aa35fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that are flagged as malicious redirectors, specifically targeting users interested in game hacks and free currency for games like Roblox. The document body and extracted URLs reinforce this lure, suggesting the primary goal is to drive traffic to potentially harmful sites. While no scripts were extracted, the PDF structure and malicious links strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://netcdn.xyz/app/431946152/how-to-win-free-robux-game-hack In PDF document text
    • http://io24.com.ar/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-games-on-roblox_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_003_off00004996.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4996 36880 bytes
SHA-256: 5c29813b66c96e6ed274147a1c54cb511543b401a2d0a69ddffb4109f7ba10d5
font_01_sfnt_off00009c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C07 18496 bytes
SHA-256: e7fadbffdbea7672d80b62dbce00c4cb5a3018b55a4b8226d615899545ab846e

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