Malicious PDF — malware analysis report

Static analysis result for SHA-256 f646113dd39c38d5…

MALICIOUS

PDF

35.6 KB Created: 2021-06-21 18:52:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a38c9523efacc4a35e1669ceae79d781 SHA-1: 71aff4a91178562d903cf6e3ddca06a70ccb722d SHA-256: f646113dd39c38d5914a2d4f1df3864ef10cfb6dd2fa7da847bfe25af40d4aa7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.co/app/431946152/hack-para-roblox-dragon-ball-z-rage-game-hack. This indicates a social engineering tactic to trick users into visiting a compromised or malicious site, likely to download further malware or engage in credential harvesting. No scripts were extracted from this sample.

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/hack-para-roblox-dragon-ball-z-rage-game-hack In PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-hack-tool-download-free_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-roblox-girl-account_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-bc-for-roblox-codes_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/hacker-vs-pro-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/freecoins_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/bot-roblox-game-free_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-codes-redeem_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-hack-and-get-free-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
font_00_sfnt_off00003323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3323 22976 bytes
SHA-256: 345074bea60b5b3af52a1b7936878a7e790978f7fddc369810d60c5aafb6ba30
font_01_sfnt_off000065fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FE 19072 bytes
SHA-256: 8eb2544fa7006f4867e1a1663e4454f514ea4e3920748f4f58afe975ff39358f

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