Malicious PDF — malware analysis report

Static analysis result for SHA-256 715e5fe1629a0e2c…

MALICIOUS

PDF

32.1 KB Created: 2021-07-25 23:00:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 52af954e529f25e16acb7454bb99afb8 SHA-1: b6a449ba1fbcd860f4fb2774fa0a2f451495a848 SHA-256: 715e5fe1629a0e2c809461a73723be89501f59d2f3fb74b2b33ac1ba4c63967b
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/free-robux-no-password-game-hack, which is presented as a lure for 'free Robux' or game hacks. The document body and embedded URLs reinforce this theme, aiming to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for exploitation or further payload delivery.

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/free-robux-no-password-game-hack In PDF document text
    • http://sbm-nn.ru/images/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off00002780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2780 22388 bytes
SHA-256: f283948d1e5402c68a5494f780d998bfa91f79c4810f4169e17d415a9ab5e839
font_01_sfnt_off00005961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5961 18920 bytes
SHA-256: e32cd2d9ef9c7d65ca6dcb56925fdb086d69ea06ee0e8757ce45dcc04a676380

Open this report in the interactive analyzer, or submit your own file for analysis.