Malicious PDF — malware analysis report

Static analysis result for SHA-256 051d5bfff0c5382b…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 14:40:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 08e4834484e80c3377385f9779121a77 SHA-1: 3540fd3d2e9a51c4cda47c5fce7d85f2f38f2941 SHA-256: 051d5bfff0c5382bc7d6fbd8496587b9730c631234f0fa5c3d3ce28c35c98ebb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks. The primary malicious URL identified is http://netcdn.co/app/431946152/how-to-hack-roblox-robux-no-download-windows-10-game-hack. The document body and embedded URLs suggest a social engineering attack aimed at tricking users into visiting potentially harmful websites.

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/how-to-hack-roblox-robux-no-download-windows-10-game-hack In PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-likes-on-tiktok-no-verification_GM835599320.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/dragon-ball-ultimate-roblox-max-stats-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-event-hack_GM406889139.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/get-free-roblox-the-very-very-easy-way_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/pubg-uc-myanmar_GM1330123889.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/minecraft-free-download-unblocked_GM479516143.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_off00002eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EED 21644 bytes
SHA-256: 4007c405c5daae739fb60d1135ded03134d3ab40205c55aadfdf9a0e85b0905a
font_01_sfnt_off00005e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E75 19900 bytes
SHA-256: ad91e73292f56a8a8c6fa2bdb2bde3d09c6e25cff0b50a9834dee8a056405d24