Malicious PDF — malware analysis report

Static analysis result for SHA-256 38cfce4b7fe18b9f…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 19:18:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 040f8eed7a9dfdd982d7dd8519bf68d6 SHA-1: 77bde4c8fe73ad33af1ad92397ca02e742364b6f SHA-256: 38cfce4b7fe18b9fde43f12433ffa0665c1ec3dcfe865538e0f1b27be5aa1023
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and potentially unwanted content related to game hacks and free items. The primary lure appears to be 'Free Gfx Roblox' and similar topics, aiming to trick users into clicking through to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-gfx-roblox-game-hack In PDF document text
    • http://www.emotional-training.com/storage/editor/files/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/how-you-get-robux_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_off00004a7f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7F 25076 bytes
SHA-256: 55b3e4c62d151e0053318af519311874f5e7db5c4a90ee1c146ce12fc29c3b62
font_01_sfnt_off00008446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8446 17948 bytes
SHA-256: 93c837e91696f9c750ee981a8553ec938bcc839a54d12736034a756f397dcd55

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