Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b94efad804a0833…

MALICIOUS

PDF

45.5 KB Created: 2021-05-18 06:12:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1fc0c61ef358aeb5140b7bb29d26e9e9 SHA-1: aebe1c25cf685dec33885f1ec82e7c9257520b8c SHA-256: 9b94efad804a0833a9bb3e99d252567599802e6b2c4aeece5721e9d31a29f1e6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external URLs that are associated with malicious redirectors and game hack lures. The heuristic firings indicate that the document is designed to trick users into clicking these links, likely to download further malware or engage in phishing. Although no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-change-your-username-on-roblox-for-free-game-hack In PDF document text
    • https://academy.cr/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://academy.cr/images/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/i-robux_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://academy.cr/images/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/roblox-www-com_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/instant-robux_GM431946152.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
font_00_sfnt_off000046d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46D5 26184 bytes
SHA-256: 59a349826e33729e454dd3025a70fc8c95897ae1a60ebc5112c62b7fb3a61db8
font_01_sfnt_off000080b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B0 3120 bytes
SHA-256: 49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca
font_02_sfnt_off00008bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC3 19540 bytes
SHA-256: 93794ea5a6c5acfa8b9ea336c7fa02a00f4c27ab4f9922f3137d25115e5793d6

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