Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4cbcb47035c0ec6…

MALICIOUS

PDF

32.2 KB Created: 2021-07-30 04:02:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f1bec4d718e01340093b6cd7c0e9d95c SHA-1: bde5d43c3980d8a7234099d6b798e04138832a2b SHA-256: d4cbcb47035c0ec60f7f4441f1dc5e7273a0a07c70fae937de1a967d570bd1f3
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators' for popular games. The primary redirector URL is http://netcdn.tw/app/431946152/how-to-hack-to-get-robux-game-hack. This lure is designed to trick users into downloading potentially malicious content or visiting further compromised sites. The ML classifier also strongly indicated maliciousness.

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/431946152/how-to-hack-to-get-robux-game-hack In PDF document text
    • http://www.taxiaparis.fr/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.taxiaparis.fr/images/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://www.taxiaparis.fr/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.taxiaparis.fr/images/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://www.taxiaparis.fr/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://www.taxiaparis.fr/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.taxiaparis.fr/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://www.taxiaparis.fr/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.taxiaparis.fr/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.taxiaparis.fr/images/minecraft-java-edition-redeem-code-free-2021_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_off00002811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2811 22512 bytes
SHA-256: 5f004b2c2f0800d637b79b982176a96cdf798910dc219768716db51107299325
font_01_sfnt_off00005a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A49 18700 bytes
SHA-256: 422c4f1b8ce49a2bad5064ab2df80448ff4f857d80ac720e8fae67c1278daef4

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