Malicious PDF — malware analysis report

Static analysis result for SHA-256 da441ec53f459b13…

MALICIOUS

PDF

43.8 KB Created: 2021-05-12 10:06:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bba6a654dac90cd45c5c3ddb010e7dfb SHA-1: bb58d45df061b1aeddea390e5cdf6ffa5e68232b SHA-256: da441ec53f459b138a801a4a0ed6e2d3ec044649d967cb76242b0f44cb7f3bca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body, though partially corrupted, contains a URL matching the heuristic findings. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/how-to-get-coin-master-card-free-game-hack In PDF document text
    • https://datavoiz.com/images/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://datavoiz.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://datavoiz.com/images/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://datavoiz.com/images/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://datavoiz.com/images/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://datavoiz.com/images/2021-roblox_GM431946152.pdfIn PDF document text
    • https://datavoiz.com/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://datavoiz.com/images/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • https://datavoiz.com/images/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • https://datavoiz.com/images/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://datavoiz.com/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://datavoiz.com/images/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • https://datavoiz.com/images/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • https://datavoiz.com/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://datavoiz.com/images/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • https://datavoiz.com/images/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • https://datavoiz.com/images/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://datavoiz.com/images/robux-premium_GM431946152.pdfIn PDF document text
    • https://datavoiz.com/images/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://datavoiz.com/images/free-robux-generator-no-survey-no-download-no-human-verification_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
stream_003_off000046c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46C3 24928 bytes
SHA-256: 573f0840bb561b25e868c28c34f5ce9650c7c0965b7cbe55115a05e5259e6571
font_01_sfnt_off00007f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2C 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00008946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8946 18048 bytes
SHA-256: e789d2c724ea41351e8c9ce7f7a5de89d28c485623c0379f4ca58ed4adff0f23

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