Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ce0299160a9c19…

MALICIOUS

PDF

35.1 KB Created: 2021-06-25 20:14:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 06f0135a11658f305ca7765b8a8c7e14 SHA-1: 191c3612966ab6e88da550edcb050d6c0f6494d0 SHA-256: 21ce0299160a9c19822e0e3c6c533df8468f3a9e42e2ea59130ae0f9243a044b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure for game-related cheats and currency, directing users to a malicious redirector. The embedded URL, http://netcdn.co/app/431946152/roblox-hack-unlimited-robux-apk-download-game-hack, is flagged as malicious infrastructure. While no scripts were extracted, the document's structure and embedded links strongly suggest an attempt to trick users into visiting a malicious site, likely for further malware delivery or credential harvesting.

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/roblox-hack-unlimited-robux-apk-download-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/como-hackear-una-cuenta-de-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/money-hack-sur-sunset-city-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/100-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/rxgate-cf-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-do-you-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-level-7-script-executor-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-noclip-hack-december-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-hourly-giveaway_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-how-to-hack-robux-with-cheat-engine-64-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-cheats-for-robux-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-money-is-roblox_GM431946152.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_off00002e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E50 23156 bytes
SHA-256: bbeebcf621ccbbf569d32f03c4946560a8fc2fe667ab5a90af99ef6fa8360624
font_01_sfnt_off00006168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6168 19964 bytes
SHA-256: 859e97e2e1acf531379428f9d2099f6c0f0873458a365bab9fd4e68f07be1895

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