Malicious PDF — malware analysis report

Static analysis result for SHA-256 38015588d30eaa87…

MALICIOUS

PDF

34.8 KB Created: 2021-06-18 01:39:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b81018f42fb3a81082f470d7333bf22c SHA-1: 76b1bc780e6b0af725a8f795a6014af5d9d1e767 SHA-256: 38015588d30eaa87cc52b9cafb91f7b2498330024391916488b94fb7ff72bcd7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users to click on malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/robux-codes-for-free-game-hack In PDF document text
    • http://www.3d-gold.com.hk/upload/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/robux-win_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-generator-for-roblox-2021_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_002_off00002fa4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FA4 23232 bytes
SHA-256: 22c4a344a7d17db262b35a4d07a81b4382987a6054de415ff0c24a11678778fa
font_01_sfnt_off00006403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6403 18704 bytes
SHA-256: a633616750874b4270d2d33fe2e5399de95b4dff14a090313ff118deaa5fbeb9

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