Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd176aeea8da37e…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 22:31:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 13b789655098943503d7de43e7fedb7d SHA-1: 5e85031b0e79f2f4b41511318d21ef33e2695f77 SHA-256: bcd176aeea8da37ea3ec43c34180d3437a18fbbc34f4d718e0d424d841c6a5c7
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

The PDF contains a critical heuristic firing for a game hack redirector lure, impersonating Facebook to entice users with the promise of free Robux. The embedded URL, https://netcdn.online/app/431946152/is-there-any-way-to-get-free-robux-game-hack, is associated with malicious redirector infrastructure. This suggests the document's primary purpose is to facilitate credential phishing or lead users to a malicious download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/is-there-any-way-to-get-free-robux-game-hack.
  • 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.online/app/431946152/is-there-any-way-to-get-free-robux-game-hack In PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005148.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5148 24864 bytes
SHA-256: 6cb8a672ff465ae11f7d7e490fedb4880408e77fff061a4839c19f33aac47ba7
font_01_sfnt_off00008a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A76 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000971e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x971E 18892 bytes
SHA-256: d4b621edf5ac5f073c5a65dd804db4f1f2ad13c123c1b5ace541ce5f5c284f58