Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55416786176aca8…

MALICIOUS

PDF

34.0 KB Created: 2021-06-20 07:27:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dc62e5c8ea16bdc9e4669f7fe2921147 SHA-1: 6a2f9d9db149b82a248d49d5c059d45cbb978055 SHA-256: f55416786176aca8e663184cdc47ed875a2478382cc753246de8d5fe0c9d33f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to Roblox game hacks to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/combo-with-free-hats-roblox-game-hack, is identified as a malicious redirector. The document's structure and embedded URLs suggest an attempt to drive users to potentially malicious download sites or further phishing content. No scripts were extracted, but the PDF's nature and linked content indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/combo-with-free-hats-roblox-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-hack-no-app-install_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-hack-executor-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-blood-moon-tycoon-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-can-you-get-robux-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hacking-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-how-to-get-free-robux-without-hacking_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-vehicle-simulator-shakedown-hack-glitch_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/bloxfree-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheat-gg-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-unlimited-robux-ad_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robuxian-com-free-robux-code_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-mobile-hack-apk_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-tix-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/blue-scythe-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-games-by-admin_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED0 21816 bytes
SHA-256: 541fbc99c94913f6c18ea25151379781861a0e37f3e89b4e903fee69ac8a21b4
font_01_sfnt_off00005e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E87 19496 bytes
SHA-256: 9e244fdbaf83fe0cb948bd38241cc451b886e0a996b0732fb9b5370a67cfecb2

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