Malicious PDF — malware analysis report

Static analysis result for SHA-256 36620a68b86fb8dd…

MALICIOUS

PDF

46.2 KB Created: 2021-05-16 03:06:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3d1532b0867c7b6d7e08271f43d3927c SHA-1: e098fdbb7fc6c5124374511912adc478113644a3 SHA-256: 36620a68b86fb8dd0776a140f3598d2c5514740bab6ee6aa0ab46dc3f1ede5c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and potentially malicious sites, disguised as generators for popular games. The heuristic firings indicate that the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. Although no scripts were explicitly extracted, the nature of the links and the ML classification suggest a malicious intent to lure users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/spin-and-coin-link-game-hack In PDF document text
    • http://cristalysoptic.com/images/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-generator_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/wurst-mc_GM479516143.pdfIn PDF document text
    • http://cristalysoptic.com/images/earn-robux_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/more-robux_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://cristalysoptic.com/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://cristalysoptic.com/images/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://cristalysoptic.com/images/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://cristalysoptic.com/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B4 25928 bytes
SHA-256: 9c82ecd645c992d0d1eda32b9a9a7ea7120e78aa0878549c7a209d4c974c5206
font_01_sfnt_off0000819b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819B 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off000093b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93B3 17736 bytes
SHA-256: 712bfdfe30982b1ff8f7dea34df7c3666928d55570c192a0b250fd08dd003b23

Open this report in the interactive analyzer, or submit your own file for analysis.