Malicious PDF — malware analysis report

Static analysis result for SHA-256 0271e3dff2930bae…

MALICIOUS

PDF

33.9 KB Created: 2021-07-19 22:47:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 38ab6362349020ceec4a3e7ff8f38c0e SHA-1: e739b0a3c72d27ad5a228fd0ad7fac39f0576f77 SHA-256: 0271e3dff2930bae2c1693bbc4b3c82c4c4978a2dfe9026ad96366b9fa038ca5
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirector infrastructure, specifically http://netcdn.tw/app/835599320/free-tiktok-followers-no-downloads-game-hack, which is presented as a "free generator / game hack". The document body also contains this URL and other links to potentially malicious PDF files. This indicates a lure to a malicious site that likely serves further payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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/free-tiktok-followers-no-downloads-game-hack In PDF document text
    • http://www.sbairs.com/datas/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-java-edition-code-free_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_off00002d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8C 23440 bytes
SHA-256: 1b79d0d8f752ba411a519b70942aee192027ba8df047f4b23622fe92ac08fe0b
font_01_sfnt_off00006274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6274 18264 bytes
SHA-256: d5c5ec98edba9b40f9bc8010b923702a5e25c64ded77377ab4934560472c0c7c

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