Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d6c6d8be5d3f97…

MALICIOUS

PDF

32.7 KB Created: 2021-07-19 11:19:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 186a9b8fc8e466972cea5c6f8ce3a3af SHA-1: 2e5a5df155cdd2fee429aa0760f4e59637226e31 SHA-256: e8d6c6d8be5d3f9723e643ebf779a1bf3ca8285d5b1a289c527ec3f46e3abe81
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' or 'game hacks' for platforms like TikTok and Minecraft. The primary lure URL is http://netcdn.tw/app/835599320/how-to-get-free-likes-on-tiktok-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to trick users into visiting malicious sites, likely to download further malware or engage in credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.tw/app/835599320/how-to-get-free-likes-on-tiktok-game-hack In PDF document text
    • http://tc-kulmbach.de/images/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://tc-kulmbach.de/images/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-robux-codes_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_off00002c3d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C3D 23096 bytes
SHA-256: fa170a3d7a6d43a0405762aab9739de58921d5d7341b1334dac7f81bd4a2c7ef
font_01_sfnt_off00005ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF6 17620 bytes
SHA-256: 1c33fd3c5ea4f422d018a8404ca3ef9e1ac10e3d86ac92994d8eaeb97cd646a5

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