Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c8753468c7f675…

MALICIOUS

PDF

50.1 KB Created: 2021-06-11 05:17:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 724cda649068def7c96ed491ff0c9942 SHA-1: 36d7f417e34ebd78ff2c5854f4ffbda54cba374b SHA-256: 27c8753468c7f675692a2a8576af47052c600b94a313f9df3031262985380537
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as game hacks and generators. The primary link, https://netcdn.tw/app/431946152/invisible-hack-roblox-2021-game-hack, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to game hacks and generators, reinforcing the lure. No scripts were extracted, but the presence of multiple malicious links indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/invisible-hack-roblox-2021-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com//repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/master-coins-free_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-toys-code-free-dog_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/robux-miner_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D2 29788 bytes
SHA-256: 16f8ac7d87d6ca757eb4a7e1fea0bb5c4a16855c0ef280aca43a29cdee2bbded
font_01_sfnt_off00009295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9295 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F3D 18816 bytes
SHA-256: e08e530344d74e0fb37ccef19dbe8b6ac72bd4afabd5dcbf993a4a9156b8bfc0

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