Malicious PDF — malware analysis report

Static analysis result for SHA-256 679fdec82ca20f78…

MALICIOUS

PDF

44.3 KB Created: 2021-06-10 18:13:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 162e997e2eb9319de304d1d76c0cfdc8 SHA-1: adb84f4d2736e797b682d70bbb2b79bf05576d9c SHA-256: 679fdec82ca20f78874283fc88e989053b778ba76c3831c12e80b11392046e50
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting game hacks and generators. The primary redirector URL is https://netcdn.tw/app/431946152/roblox-tycoon-hack-money-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or redirection attempt, likely serving as a spearphishing attachment to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-tycoon-hack-money-game-hack In PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/red-cropped-top-and-ripped-jeans-roblox-outfit-free_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-roblox-injector-for-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5344 23760 bytes
SHA-256: 31581e7f5625a044b24dd6feed9104555e05c66129cf4584376543dacf2b9905
font_01_sfnt_off0000898a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898A 18560 bytes
SHA-256: 2aa702f70662cc30b0061602e8446ae97ab2f28104d8fcc5aeb8ab363252e839

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