Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd7b405679f64f8…

MALICIOUS

PDF

42.9 KB Created: 2021-05-16 13:08:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f673256e8cc60daf904187ba4dbd5b2b SHA-1: 6178e73485ed4886a2b0b4dfb1693657fd64dd4e SHA-256: 8fd7b405679f64f879b4ceeac93107e2cc0ffe5287e06244c1f2d7a602b19efe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising game hacks and generators. The primary lure URL, 'https://netcdn.xyz/app/479516143/minecraft-tower-defense-hacked-game-hack', is flagged as malicious. The document body, though partially garbled, contains references to game hacks and the same malicious URL, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

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/479516143/minecraft-tower-defense-hacked-game-hack In PDF document text
    • https://tckontrola.hr/files/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/get-free-coins-for-coin-master_GM406889139.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_off00004c02.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C02 25020 bytes
SHA-256: 08ece8cb89f26d822bb4cd7f50665fc557f37b8b03c66f74327fc3f01724b4b6
font_01_sfnt_off00008501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8501 18388 bytes
SHA-256: 713945c209eafdfb17d9348275aac2514e7231b3ac112b5af91dabd48964bc5b

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